| County Name | State |
|---|
| Abbeville County | South Carolina |
| Acadia Parish | Louisiana |
| Accomack County | Virginia |
| Ada County | Idaho |
| Adair County (Iowa) | Iowa |
| Adair County (Kentucky) | Kentucky |
|
| Adair County (Missouri) | Missouri |
| Adair County (Oklahoma) | Oklahoma |
| Adams County (Colorado) | Colorado |
| Adams County (Idaho) | Idaho |
| Adams County (Illinois) | Illinois |
|
| Adams County (Indiana) | Indiana |
| Adams County (Iowa) | Iowa |
| Adams County (Mississippi) | Mississippi |
| Adams County (Nebraska) | Nebraska |
| Adams County (North Dakota) | North Dakota |
|
| Adams County (Ohio) | Ohio |
| Adams County (Pennsylvania) | Pennsylvania |
| Adams County (Washington) | Washington |
| Adams County (Wisconsin) | Wisconsin |
| Addison County | Vermont |
|
| Aiken County | South Carolina |
| Aitkin County | Minnesota |
| Alachua County | Florida |
| Alamance County | North Carolina |
| Alameda County | California |
| Alamosa County | Colorado |
| Albany County (New York) | New York |
| Albany County (Wyoming) | Wyoming |
| Albemarle County | Virginia |
| Alcona County | Michigan |
| Alcorn County | Mississippi |
| Aleutians East Borough | Alaska |
| Aleutians West Census Area | Alaska |
| Alexander County (Illinois) | Illinois |
| Alexander County (North Carolina) | North Carolina |
| Alexandria city | Virginia |
| Alfalfa County | Oklahoma |
| Alger County | Michigan |
| Allamakee County | Iowa |
| Allegan County | Michigan |
| Allegany County (Maryland) | Maryland |
| Allegany County (New York) | New York |
| Alleghany County (North Carolina) | North Carolina |
| Alleghany County (Virginia) | Virginia |
| Allegheny County | Pennsylvania |
| Allen County (Indiana) | Indiana |
| Allen County (Kansas) | Kansas |
| Allen County (Kentucky) | Kentucky |
| Allen County (Ohio) | Ohio |
| Allen Parish | Louisiana |
| Allendale County | South Carolina |
| Alpena County | Michigan |
| Alpine County | California |
| Amador County | California |
| Amelia County | Virginia |
| Amherst County | Virginia |
| Amite County | Mississippi |
| Anchorage Municipality | Alaska |
| Anderson County (Kansas) | Kansas |
| Anderson County (Kentucky) | Kentucky |
| Anderson County (South Carolina) | South Carolina |
| Anderson County (Tennessee) | Tennessee |
| Anderson County (Texas) | Texas |
| Andrew County | Missouri |
| Andrews County | Texas |
| Androscoggin County | Maine |
| Angelina County | Texas |
| Anne Arundel County | Maryland |
| Anoka County | Minnesota |
| Anson County | North Carolina |
| Antelope County | Nebraska |
| Antrim County | Michigan |
| Apache County | Arizona |
| Appanoose County | Iowa |
| Appling County | Georgia |
| Appomattox County | Virginia |
| Aransas County | Texas |
| Arapahoe County | Colorado |
| Archer County | Texas |
| Archuleta County | Colorado |
| Arenac County | Michigan |
| Arkansas County | Arkansas |
| Arlington County | Virginia |
| Armstrong County (Pennsylvania) | Pennsylvania |
| Armstrong County (Texas) | Texas |
| Aroostook County | Maine |
| Arthur County | Nebraska |
| Ascension Parish | Louisiana |
| Ashe County | North Carolina |
| Ashland County (Ohio) | Ohio |
| Ashland County (Wisconsin) | Wisconsin |
| Ashley County | Arkansas |
| Ashtabula County | Ohio |
| Asotin County | Washington |
| Assumption Parish | Louisiana |
| Atascosa County | Texas |
| Atchison County (Kansas) | Kansas |
| Atchison County (Missouri) | Missouri |
| Athens County | Ohio |
| Atkinson County | Georgia |
| Atlantic County | New Jersey |
| Atoka County | Oklahoma |
| Attala County | Mississippi |
| Audrain County | Missouri |
| Audubon County | Iowa |
| Auglaize County | Ohio |
| Augusta County | Virginia |
| Aurora County | South Dakota |
| Austin County | Texas |
| Autauga County | Alabama |
| Avery County | North Carolina |
| Avoyelles Parish | Louisiana |
| Baca County | Colorado |
| Bacon County | Georgia |
| Bailey County | Texas |
| Baker County (Florida) | Florida |
| Baker County (Georgia) | Georgia |
| Baker County (Oregon) | Oregon |
| Baldwin County (Alabama) | Alabama |
| Baldwin County (Georgia) | Georgia |
| Ballard County | Kentucky |
| Baltimore County | Maryland |
| Baltimore city | Maryland |
| Bamberg County | South Carolina |
| Bandera County | Texas |
| Banks County | Georgia |
| Banner County | Nebraska |
| Bannock County | Idaho |
| Baraga County | Michigan |
| Barber County | Kansas |
| Barbour County (Alabama) | Alabama |
| Barbour County (West Virginia) | West Virginia |
| Barnes County | North Dakota |
| Barnstable County | Massachusetts |
| Barnwell County | South Carolina |
| Barren County | Kentucky |
| Barron County | Wisconsin |
| Barrow County | Georgia |
| Barry County (Michigan) | Michigan |
| Barry County (Missouri) | Missouri |
| Bartholomew County | Indiana |
| Barton County (Kansas) | Kansas |
| Barton County (Missouri) | Missouri |
| Bartow County | Georgia |
| Bastrop County | Texas |
| Bates County | Missouri |
| Bath County (Kentucky) | Kentucky |
| Bath County (Virginia) | Virginia |
| Baxter County | Arkansas |
| Bay County (Florida) | Florida |
| Bay County (Michigan) | Michigan |
| Bayfield County | Wisconsin |
| Baylor County | Texas |
| Beadle County | South Dakota |
| Bear Lake County | Idaho |
| Beaufort County (North Carolina) | North Carolina |
| Beaufort County (South Carolina) | South Carolina |
| Beauregard Parish | Louisiana |
| Beaver County (Oklahoma) | Oklahoma |
| Beaver County (Pennsylvania) | Pennsylvania |
| Beaver County (Utah) | Utah |
| Beaverhead County | Montana |
| Becker County | Minnesota |
| Beckham County | Oklahoma |
| Bedford County (Pennsylvania) | Pennsylvania |
| Bedford County (Tennessee) | Tennessee |
| Bedford County (Virginia) | Virginia |
| Bee County | Texas |
| Belknap County | New Hampshire |
| Bell County (Kentucky) | Kentucky |
| Bell County (Texas) | Texas |
| Belmont County | Ohio |
| Beltrami County | Minnesota |
| Ben Hill County | Georgia |
| Benewah County | Idaho |
| Bennett County | South Dakota |
| Bennington County | Vermont |
| Benson County | North Dakota |
| Bent County | Colorado |
| Benton County (Arkansas) | Arkansas |
| Benton County (Indiana) | Indiana |
| Benton County (Iowa) | Iowa |
| Benton County (Minnesota) | Minnesota |
| Benton County (Mississippi) | Mississippi |
| Benton County (Missouri) | Missouri |
| Benton County (Oregon) | Oregon |
| Benton County (Tennessee) | Tennessee |
| Benton County (Washington) | Washington |
| Benzie County | Michigan |
| Bergen County | New Jersey |
| Berkeley County (South Carolina) | South Carolina |
| Berkeley County (West Virginia) | West Virginia |
| Berks County | Pennsylvania |
| Berkshire County | Massachusetts |
| Bernalillo County | New Mexico |
| Berrien County (Georgia) | Georgia |
| Berrien County (Michigan) | Michigan |
| Bertie County | North Carolina |
| Bethel Census Area | Alaska |
| Bexar County | Texas |
| Bibb County (Alabama) | Alabama |
| Bibb County (Georgia) | Georgia |
| Bienville Parish | Louisiana |
| Big Horn County (Montana) | Montana |
| Big Horn County (Wyoming) | Wyoming |
| Big Stone County | Minnesota |
| Billings County | North Dakota |
| Bingham County | Idaho |
| Black Hawk County | Iowa |
| Blackford County | Indiana |
| Bladen County | North Carolina |
| Blaine County (Idaho) | Idaho |
| Blaine County (Montana) | Montana |
| Blaine County (Nebraska) | Nebraska |
| Blaine County (Oklahoma) | Oklahoma |
| Blair County | Pennsylvania |
| Blanco County | Texas |
| Bland County | Virginia |
| Bleckley County | Georgia |
| Bledsoe County | Tennessee |
| Blount County (Alabama) | Alabama |
| Blount County (Tennessee) | Tennessee |
| Blue Earth County | Minnesota |
| Boise County | Idaho |
| Bolivar County | Mississippi |
| Bollinger County | Missouri |
| Bon Homme County | South Dakota |
| Bond County | Illinois |
| Bonner County | Idaho |
| Bonneville County | Idaho |
| Boone County (Arkansas) | Arkansas |
| Boone County (Illinois) | Illinois |
| Boone County (Indiana) | Indiana |
| Boone County (Iowa) | Iowa |
| Boone County (Kentucky) | Kentucky |
| Boone County (Missouri) | Missouri |
| Boone County (Nebraska) | Nebraska |
| Boone County (West Virginia) | West Virginia |
| Borden County | Texas |
| Bosque County | Texas |
| Bossier Parish | Louisiana |
| Botetourt County | Virginia |
| Bottineau County | North Dakota |
| Boulder County | Colorado |
| Boundary County | Idaho |
| Bourbon County (Kansas) | Kansas |
| Bourbon County (Kentucky) | Kentucky |
| Bowie County | Texas |
| Bowman County | North Dakota |
| Box Butte County | Nebraska |
| Box Elder County | Utah |
| Boyd County (Kentucky) | Kentucky |
| Boyd County (Nebraska) | Nebraska |
| Boyle County | Kentucky |
| Bracken County | Kentucky |
| Bradford County (Florida) | Florida |
| Bradford County (Pennsylvania) | Pennsylvania |
| Bradley County (Arkansas) | Arkansas |
| Bradley County (Tennessee) | Tennessee |
| Branch County | Michigan |
| Brantley County | Georgia |
| Braxton County | West Virginia |
| Brazoria County | Texas |
| Brazos County | Texas |
| Breathitt County | Kentucky |
| Breckinridge County | Kentucky |
| Bremer County | Iowa |
| Brevard County | Florida |
| Brewster County | Texas |
| Briscoe County | Texas |
| Bristol Bay Borough | Alaska |
| Bristol County (Massachusetts) | Massachusetts |
| Bristol County (Rhode Island) | Rhode Island |
| Bristol city | Virginia |
| Broadwater County | Montana |
| Bronx County | New York |
| Brooke County | West Virginia |
| Brookings County | South Dakota |
| Brooks County (Georgia) | Georgia |
| Brooks County (Texas) | Texas |
| Broome County | New York |
| Broomfield County | Colorado |
| Broward County | Florida |
| Brown County (Illinois) | Illinois |
| Brown County (Indiana) | Indiana |
| Brown County (Kansas) | Kansas |
| Brown County (Minnesota) | Minnesota |
| Brown County (Nebraska) | Nebraska |
| Brown County (Ohio) | Ohio |
| Brown County (South Dakota) | South Dakota |
| Brown County (Texas) | Texas |
| Brown County (Wisconsin) | Wisconsin |
| Brule County | South Dakota |
| Brunswick County (North Carolina) | North Carolina |
| Brunswick County (Virginia) | Virginia |
| Bryan County (Georgia) | Georgia |
| Bryan County (Oklahoma) | Oklahoma |
| Buchanan County (Iowa) | Iowa |
| Buchanan County (Missouri) | Missouri |
| Buchanan County (Virginia) | Virginia |
| Buckingham County | Virginia |
| Bucks County | Pennsylvania |
| Buena Vista County | Iowa |
| Buena Vista city | Virginia |
| Buffalo County (Nebraska) | Nebraska |
| Buffalo County (South Dakota) | South Dakota |
| Buffalo County (Wisconsin) | Wisconsin |
| Bullitt County | Kentucky |
| Bulloch County | Georgia |
| Bullock County | Alabama |
| Buncombe County | North Carolina |
| Bureau County | Illinois |
| Burke County (Georgia) | Georgia |
| Burke County (North Carolina) | North Carolina |
| Burke County (North Dakota) | North Dakota |
| Burleigh County | North Dakota |
| Burleson County | Texas |
| Burlington County | New Jersey |
| Burnet County | Texas |
| Burnett County | Wisconsin |
| Burt County | Nebraska |
| Butler County (Alabama) | Alabama |
| Butler County (Iowa) | Iowa |
| Butler County (Kansas) | Kansas |
| Butler County (Kentucky) | Kentucky |
| Butler County (Missouri) | Missouri |
| Butler County (Nebraska) | Nebraska |
| Butler County (Ohio) | Ohio |
| Butler County (Pennsylvania) | Pennsylvania |
| Butte County (California) | California |
| Butte County (Idaho) | Idaho |
| Butte County (South Dakota) | South Dakota |
| Butts County | Georgia |
| Cabarrus County | North Carolina |
| Cabell County | West Virginia |
| Cache County | Utah |
| Caddo County | Oklahoma |
| Caddo Parish | Louisiana |
| Calaveras County | California |
| Calcasieu Parish | Louisiana |
| Caldwell County (Kentucky) | Kentucky |
| Caldwell County (Missouri) | Missouri |
| Caldwell County (North Carolina) | North Carolina |
| Caldwell County (Texas) | Texas |
| Caldwell Parish | Louisiana |
| Caledonia County | Vermont |
| Calhoun County (Alabama) | Alabama |
| Calhoun County (Arkansas) | Arkansas |
| Calhoun County (Florida) | Florida |
| Calhoun County (Georgia) | Georgia |
| Calhoun County (Illinois) | Illinois |
| Calhoun County (Iowa) | Iowa |
| Calhoun County (Michigan) | Michigan |
| Calhoun County (Mississippi) | Mississippi |
| Calhoun County (South Carolina) | South Carolina |
| Calhoun County (Texas) | Texas |
| Calhoun County (West Virginia) | West Virginia |
| Callahan County | Texas |
| Callaway County | Missouri |
| Calloway County | Kentucky |
| Calumet County | Wisconsin |
| Calvert County | Maryland |
| Camas County | Idaho |
| Cambria County | Pennsylvania |
| Camden County (Georgia) | Georgia |
| Camden County (Missouri) | Missouri |
| Camden County (New Jersey) | New Jersey |
| Camden County (North Carolina) | North Carolina |
| Cameron County (Pennsylvania) | Pennsylvania |
| Cameron County (Texas) | Texas |
| Cameron Parish | Louisiana |
| Camp County | Texas |
| Campbell County (Kentucky) | Kentucky |
| Campbell County (South Dakota) | South Dakota |
| Campbell County (Tennessee) | Tennessee |
| Campbell County (Virginia) | Virginia |
| Campbell County (Wyoming) | Wyoming |
| Canadian County | Oklahoma |
| Candler County | Georgia |
| Cannon County | Tennessee |
| Canyon County | Idaho |
| Cape Girardeau County | Missouri |
| Cape May County | New Jersey |
| Carbon County (Montana) | Montana |
| Carbon County (Pennsylvania) | Pennsylvania |
| Carbon County (Utah) | Utah |
| Carbon County (Wyoming) | Wyoming |
| Caribou County | Idaho |
| Carlisle County | Kentucky |
| Carlton County | Minnesota |
| Caroline County (Maryland) | Maryland |
| Caroline County (Virginia) | Virginia |
| Carroll County (Arkansas) | Arkansas |
| Carroll County (Georgia) | Georgia |
| Carroll County (Illinois) | Illinois |
| Carroll County (Indiana) | Indiana |
| Carroll County (Iowa) | Iowa |
| Carroll County (Kentucky) | Kentucky |
| Carroll County (Maryland) | Maryland |
| Carroll County (Mississippi) | Mississippi |
| Carroll County (Missouri) | Missouri |
| Carroll County (New Hampshire) | New Hampshire |
| Carroll County (Ohio) | Ohio |
| Carroll County (Tennessee) | Tennessee |
| Carroll County (Virginia) | Virginia |
| Carson City | Nevada |
| Carson County | Texas |
| Carter County (Kentucky) | Kentucky |
| Carter County (Missouri) | Missouri |
| Carter County (Montana) | Montana |
| Carter County (Oklahoma) | Oklahoma |
| Carter County (Tennessee) | Tennessee |
| Carteret County | North Carolina |
| Carver County | Minnesota |
| Cascade County | Montana |
| Casey County | Kentucky |
| Cass County (Illinois) | Illinois |
| Cass County (Indiana) | Indiana |
| Cass County (Iowa) | Iowa |
| Cass County (Michigan) | Michigan |
| Cass County (Minnesota) | Minnesota |
| Cass County (Missouri) | Missouri |
| Cass County (Nebraska) | Nebraska |
| Cass County (North Dakota) | North Dakota |
| Cass County (Texas) | Texas |
| Cassia County | Idaho |
| Castro County | Texas |
| Caswell County | North Carolina |
| Catahoula Parish | Louisiana |
| Catawba County | North Carolina |
| Catoosa County | Georgia |
| Catron County | New Mexico |
| Cattaraugus County | New York |
| Cavalier County | North Dakota |
| Cayuga County | New York |
| Cecil County | Maryland |
| Cedar County (Iowa) | Iowa |
| Cedar County (Missouri) | Missouri |
| Cedar County (Nebraska) | Nebraska |
| Centre County | Pennsylvania |
| Cerro Gordo County | Iowa |
| Chaffee County | Colorado |
| Chambers County (Alabama) | Alabama |
| Chambers County (Texas) | Texas |
| Champaign County (Illinois) | Illinois |
| Champaign County (Ohio) | Ohio |
| Chariton County | Missouri |
| Charles City County | Virginia |
| Charles County | Maryland |
| Charles Mix County | South Dakota |
| Charleston County | South Carolina |
| Charlevoix County | Michigan |
| Charlotte County (Florida) | Florida |
| Charlotte County (Virginia) | Virginia |
| Charlottesville city | Virginia |
| Charlton County | Georgia |
| Chase County (Kansas) | Kansas |
| Chase County (Nebraska) | Nebraska |
| Chatham County (Georgia) | Georgia |
| Chatham County (North Carolina) | North Carolina |
| Chattahoochee County | Georgia |
| Chattooga County | Georgia |
| Chautauqua County (Kansas) | Kansas |
| Chautauqua County (New York) | New York |
| Chaves County | New Mexico |
| Cheatham County | Tennessee |
| Cheboygan County | Michigan |
| Chelan County | Washington |
| Chemung County | New York |
| Chenango County | New York |
| Cherokee County (Alabama) | Alabama |
| Cherokee County (Georgia) | Georgia |
| Cherokee County (Iowa) | Iowa |
| Cherokee County (Kansas) | Kansas |
| Cherokee County (North Carolina) | North Carolina |
| Cherokee County (Oklahoma) | Oklahoma |
| Cherokee County (South Carolina) | South Carolina |
| Cherokee County (Texas) | Texas |
| Cherry County | Nebraska |
| Chesapeake city | Virginia |
| Cheshire County | New Hampshire |
| Chester County (Pennsylvania) | Pennsylvania |
| Chester County (South Carolina) | South Carolina |
| Chester County (Tennessee) | Tennessee |
| Chesterfield County (South Carolina) | South Carolina |
| Chesterfield County (Virginia) | Virginia |
| Cheyenne County (Colorado) | Colorado |
| Cheyenne County (Kansas) | Kansas |
| Cheyenne County (Nebraska) | Nebraska |
| Chickasaw County (Iowa) | Iowa |
| Chickasaw County (Mississippi) | Mississippi |
| Chicot County | Arkansas |
| Childress County | Texas |
| Chilton County | Alabama |
| Chippewa County (Michigan) | Michigan |
| Chippewa County (Minnesota) | Minnesota |
| Chippewa County (Wisconsin) | Wisconsin |
| Chisago County | Minnesota |
| Chittenden County | Vermont |
| Choctaw County (Alabama) | Alabama |
| Choctaw County (Mississippi) | Mississippi |
| Choctaw County (Oklahoma) | Oklahoma |
| Chouteau County | Montana |
| Chowan County | North Carolina |
| Christian County (Illinois) | Illinois |
| Christian County (Kentucky) | Kentucky |
| Christian County (Missouri) | Missouri |
| Chugach Census Area | Alaska |
| Churchill County | Nevada |
| Cibola County | New Mexico |
| Cimarron County | Oklahoma |
| Citrus County | Florida |
| Clackamas County | Oregon |
| Claiborne County (Mississippi) | Mississippi |
| Claiborne County (Tennessee) | Tennessee |
| Claiborne Parish | Louisiana |
| Clallam County | Washington |
| Clare County | Michigan |
| Clarendon County | South Carolina |
| Clarion County | Pennsylvania |
| Clark County (Arkansas) | Arkansas |
| Clark County (Idaho) | Idaho |
| Clark County (Illinois) | Illinois |
| Clark County (Indiana) | Indiana |
| Clark County (Kansas) | Kansas |
| Clark County (Kentucky) | Kentucky |
| Clark County (Missouri) | Missouri |
| Clark County (Nevada) | Nevada |
| Clark County (Ohio) | Ohio |
| Clark County (South Dakota) | South Dakota |
| Clark County (Washington) | Washington |
| Clark County (Wisconsin) | Wisconsin |
| Clarke County (Alabama) | Alabama |
| Clarke County (Georgia) | Georgia |
| Clarke County (Iowa) | Iowa |
| Clarke County (Mississippi) | Mississippi |
| Clarke County (Virginia) | Virginia |
| Clatsop County | Oregon |
| Clay County (Alabama) | Alabama |
| Clay County (Arkansas) | Arkansas |
| Clay County (Florida) | Florida |
| Clay County (Georgia) | Georgia |
| Clay County (Illinois) | Illinois |
| Clay County (Indiana) | Indiana |
| Clay County (Iowa) | Iowa |
| Clay County (Kansas) | Kansas |
| Clay County (Kentucky) | Kentucky |
| Clay County (Minnesota) | Minnesota |
| Clay County (Mississippi) | Mississippi |
| Clay County (Missouri) | Missouri |
| Clay County (Nebraska) | Nebraska |
| Clay County (North Carolina) | North Carolina |
| Clay County (South Dakota) | South Dakota |
| Clay County (Tennessee) | Tennessee |
| Clay County (Texas) | Texas |
| Clay County (West Virginia) | West Virginia |
| Clayton County (Georgia) | Georgia |
| Clayton County (Iowa) | Iowa |
| Clear Creek County | Colorado |
| Clearfield County | Pennsylvania |
| Clearwater County (Idaho) | Idaho |
| Clearwater County (Minnesota) | Minnesota |
| Cleburne County (Alabama) | Alabama |
| Cleburne County (Arkansas) | Arkansas |
| Clermont County | Ohio |
| Cleveland County (Arkansas) | Arkansas |
| Cleveland County (North Carolina) | North Carolina |
| Cleveland County (Oklahoma) | Oklahoma |
| Clinch County | Georgia |
| Clinton County (Illinois) | Illinois |
| Clinton County (Indiana) | Indiana |
| Clinton County (Iowa) | Iowa |
| Clinton County (Kentucky) | Kentucky |
| Clinton County (Michigan) | Michigan |
| Clinton County (Missouri) | Missouri |
| Clinton County (New York) | New York |
| Clinton County (Ohio) | Ohio |
| Clinton County (Pennsylvania) | Pennsylvania |
| Cloud County | Kansas |
| Coahoma County | Mississippi |
| Coal County | Oklahoma |
| Cobb County | Georgia |
| Cochise County | Arizona |
| Cochran County | Texas |
| Cocke County | Tennessee |
| Coconino County | Arizona |
| Codington County | South Dakota |
| Coffee County (Alabama) | Alabama |
| Coffee County (Georgia) | Georgia |
| Coffee County (Tennessee) | Tennessee |
| Coffey County | Kansas |
| Coke County | Texas |
| Colbert County | Alabama |
| Cole County | Missouri |
| Coleman County | Texas |
| Coles County | Illinois |
| Colfax County (Nebraska) | Nebraska |
| Colfax County (New Mexico) | New Mexico |
| Colleton County | South Carolina |
| Collier County | Florida |
| Collin County | Texas |
| Collingsworth County | Texas |
| Colonial Heights city | Virginia |
| Colorado County | Texas |
| Colquitt County | Georgia |
| Columbia County (Arkansas) | Arkansas |
| Columbia County (Florida) | Florida |
| Columbia County (Georgia) | Georgia |
| Columbia County (New York) | New York |
| Columbia County (Oregon) | Oregon |
| Columbia County (Pennsylvania) | Pennsylvania |
| Columbia County (Washington) | Washington |
| Columbia County (Wisconsin) | Wisconsin |
| Columbiana County | Ohio |
| Columbus County | North Carolina |
| Colusa County | California |
| Comal County | Texas |
| Comanche County (Kansas) | Kansas |
| Comanche County (Oklahoma) | Oklahoma |
| Comanche County (Texas) | Texas |
| Concho County | Texas |
| Concordia Parish | Louisiana |
| Conecuh County | Alabama |
| Conejos County | Colorado |
| Contra Costa County | California |
| Converse County | Wyoming |
| Conway County | Arkansas |
| Cook County (Georgia) | Georgia |
| Cook County (Illinois) | Illinois |
| Cook County (Minnesota) | Minnesota |
| Cooke County | Texas |
| Cooper County | Missouri |
| Coos County (New Hampshire) | New Hampshire |
| Coos County (Oregon) | Oregon |
| Coosa County | Alabama |
| Copiah County | Mississippi |
| Copper River Census Area | Alaska |
| Corson County | South Dakota |
| Cortland County | New York |
| Coryell County | Texas |
| Coshocton County | Ohio |
| Costilla County | Colorado |
| Cottle County | Texas |
| Cotton County | Oklahoma |
| Cottonwood County | Minnesota |
| Covington County (Alabama) | Alabama |
| Covington County (Mississippi) | Mississippi |
| Covington city | Virginia |
| Coweta County | Georgia |
| Cowley County | Kansas |
| Cowlitz County | Washington |
| Craig County (Oklahoma) | Oklahoma |
| Craig County (Virginia) | Virginia |
| Craighead County | Arkansas |
| Crane County | Texas |
| Craven County | North Carolina |
| Crawford County (Arkansas) | Arkansas |
| Crawford County (Georgia) | Georgia |
| Crawford County (Illinois) | Illinois |
| Crawford County (Indiana) | Indiana |
| Crawford County (Iowa) | Iowa |
| Crawford County (Kansas) | Kansas |
| Crawford County (Michigan) | Michigan |
| Crawford County (Missouri) | Missouri |
| Crawford County (Ohio) | Ohio |
| Crawford County (Pennsylvania) | Pennsylvania |
| Crawford County (Wisconsin) | Wisconsin |
| Creek County | Oklahoma |
| Crenshaw County | Alabama |
| Crisp County | Georgia |
| Crittenden County (Arkansas) | Arkansas |
| Crittenden County (Kentucky) | Kentucky |
| Crockett County (Tennessee) | Tennessee |
| Crockett County (Texas) | Texas |
| Crook County (Oregon) | Oregon |
| Crook County (Wyoming) | Wyoming |
| Crosby County | Texas |
| Cross County | Arkansas |
| Crow Wing County | Minnesota |
| Crowley County | Colorado |
| Culberson County | Texas |
| Cullman County | Alabama |
| Culpeper County | Virginia |
| Cumberland County (Illinois) | Illinois |
| Cumberland County (Kentucky) | Kentucky |
| Cumberland County (Maine) | Maine |
| Cumberland County (New Jersey) | New Jersey |
| Cumberland County (North Carolina) | North Carolina |
| Cumberland County (Pennsylvania) | Pennsylvania |
| Cumberland County (Tennessee) | Tennessee |
| Cumberland County (Virginia) | Virginia |
| Cuming County | Nebraska |
| Currituck County | North Carolina |
| Curry County (New Mexico) | New Mexico |
| Curry County (Oregon) | Oregon |
| Custer County (Colorado) | Colorado |
| Custer County (Idaho) | Idaho |
| Custer County (Montana) | Montana |
| Custer County (Nebraska) | Nebraska |
| Custer County (Oklahoma) | Oklahoma |
| Custer County (South Dakota) | South Dakota |
| Cuyahoga County | Ohio |
| Dade County (Georgia) | Georgia |
| Dade County (Missouri) | Missouri |
| Daggett County | Utah |
| Dakota County (Minnesota) | Minnesota |
| Dakota County (Nebraska) | Nebraska |
| Dale County | Alabama |
| Dallam County | Texas |
| Dallas County (Alabama) | Alabama |
| Dallas County (Arkansas) | Arkansas |
| Dallas County (Iowa) | Iowa |
| Dallas County (Missouri) | Missouri |
| Dallas County (Texas) | Texas |
| Dane County | Wisconsin |
| Daniels County | Montana |
| Danville city | Virginia |
| Dare County | North Carolina |
| Darke County | Ohio |
| Darlington County | South Carolina |
| Dauphin County | Pennsylvania |
| Davidson County (North Carolina) | North Carolina |
| Davidson County (Tennessee) | Tennessee |
| Davie County | North Carolina |
| Daviess County (Indiana) | Indiana |
| Daviess County (Kentucky) | Kentucky |
| Daviess County (Missouri) | Missouri |
| Davis County (Iowa) | Iowa |
| Davis County (Utah) | Utah |
| Davison County | South Dakota |
| Dawes County | Nebraska |
| Dawson County (Georgia) | Georgia |
| Dawson County (Montana) | Montana |
| Dawson County (Nebraska) | Nebraska |
| Dawson County (Texas) | Texas |
| Day County | South Dakota |
| De Baca County | New Mexico |
| De Soto Parish | Louisiana |
| De Witt County | Illinois |
| DeKalb County (Alabama) | Alabama |
| DeKalb County (Georgia) | Georgia |
| DeKalb County (Illinois) | Illinois |
| DeKalb County (Indiana) | Indiana |
| DeKalb County (Missouri) | Missouri |
| DeKalb County (Tennessee) | Tennessee |
| DeSoto County (Florida) | Florida |
| DeSoto County (Mississippi) | Mississippi |
| DeWitt County | Texas |
| Deaf Smith County | Texas |
| Dearborn County | Indiana |
| Decatur County (Georgia) | Georgia |
| Decatur County (Indiana) | Indiana |
| Decatur County (Iowa) | Iowa |
| Decatur County (Kansas) | Kansas |
| Decatur County (Tennessee) | Tennessee |
| Deer Lodge County | Montana |
| Defiance County | Ohio |
| Del Norte County | California |
| Delaware County (Indiana) | Indiana |
| Delaware County (Iowa) | Iowa |
| Delaware County (New York) | New York |
| Delaware County (Ohio) | Ohio |
| Delaware County (Oklahoma) | Oklahoma |
| Delaware County (Pennsylvania) | Pennsylvania |
| Delta County (Colorado) | Colorado |
| Delta County (Michigan) | Michigan |
| Delta County (Texas) | Texas |
| Denali Borough | Alaska |
| Dent County | Missouri |
| Denton County | Texas |
| Denver County | Colorado |
| Des Moines County | Iowa |
| Deschutes County | Oregon |
| Desha County | Arkansas |
| Deuel County (Nebraska) | Nebraska |
| Deuel County (South Dakota) | South Dakota |
| Dewey County (Oklahoma) | Oklahoma |
| Dewey County (South Dakota) | South Dakota |
| Dickens County | Texas |
| Dickenson County | Virginia |
| Dickey County | North Dakota |
| Dickinson County (Iowa) | Iowa |
| Dickinson County (Kansas) | Kansas |
| Dickinson County (Michigan) | Michigan |
| Dickson County | Tennessee |
| Dillingham Census Area | Alaska |
| Dillon County | South Carolina |
| Dimmit County | Texas |
| Dinwiddie County | Virginia |
| District of Columbia | District of Columbia |
| Divide County | North Dakota |
| Dixie County | Florida |
| Dixon County | Nebraska |
| Doddridge County | West Virginia |
| Dodge County (Georgia) | Georgia |
| Dodge County (Minnesota) | Minnesota |
| Dodge County (Nebraska) | Nebraska |
| Dodge County (Wisconsin) | Wisconsin |
| Dolores County | Colorado |
| Doniphan County | Kansas |
| Donley County | Texas |
| Dooly County | Georgia |
| Door County | Wisconsin |
| Dorchester County (Maryland) | Maryland |
| Dorchester County (South Carolina) | South Carolina |
| Dougherty County | Georgia |
| Douglas County (Colorado) | Colorado |
| Douglas County (Georgia) | Georgia |
| Douglas County (Illinois) | Illinois |
| Douglas County (Kansas) | Kansas |
| Douglas County (Minnesota) | Minnesota |
| Douglas County (Missouri) | Missouri |
| Douglas County (Nebraska) | Nebraska |
| Douglas County (Nevada) | Nevada |
| Douglas County (Oregon) | Oregon |
| Douglas County (South Dakota) | South Dakota |
| Douglas County (Washington) | Washington |
| Douglas County (Wisconsin) | Wisconsin |
| Doña Ana County | New Mexico |
| Drew County | Arkansas |
| DuPage County | Illinois |
| Dubois County | Indiana |
| Dubuque County | Iowa |
| Duchesne County | Utah |
| Dukes County | Massachusetts |
| Dundy County | Nebraska |
| Dunklin County | Missouri |
| Dunn County (North Dakota) | North Dakota |
| Dunn County (Wisconsin) | Wisconsin |
| Duplin County | North Carolina |
| Durham County | North Carolina |
| Dutchess County | New York |
| Duval County (Florida) | Florida |
| Duval County (Texas) | Texas |
| Dyer County | Tennessee |
| Eagle County | Colorado |
| Early County | Georgia |
| East Baton Rouge Parish | Louisiana |
| East Carroll Parish | Louisiana |
| East Feliciana Parish | Louisiana |
| Eastland County | Texas |
| Eaton County | Michigan |
| Eau Claire County | Wisconsin |
| Echols County | Georgia |
| Ector County | Texas |
| Eddy County (New Mexico) | New Mexico |
| Eddy County (North Dakota) | North Dakota |
| Edgar County | Illinois |
| Edgecombe County | North Carolina |
| Edgefield County | South Carolina |
| Edmonson County | Kentucky |
| Edmunds County | South Dakota |
| Edwards County (Illinois) | Illinois |
| Edwards County (Kansas) | Kansas |
| Edwards County (Texas) | Texas |
| Effingham County (Georgia) | Georgia |
| Effingham County (Illinois) | Illinois |
| El Dorado County | California |
| El Paso County (Colorado) | Colorado |
| El Paso County (Texas) | Texas |
| Elbert County (Colorado) | Colorado |
| Elbert County (Georgia) | Georgia |
| Elk County (Kansas) | Kansas |
| Elk County (Pennsylvania) | Pennsylvania |
| Elkhart County | Indiana |
| Elko County | Nevada |
| Elliott County | Kentucky |
| Ellis County (Kansas) | Kansas |
| Ellis County (Oklahoma) | Oklahoma |
| Ellis County (Texas) | Texas |
| Ellsworth County | Kansas |
| Elmore County (Alabama) | Alabama |
| Elmore County (Idaho) | Idaho |
| Emanuel County | Georgia |
| Emery County | Utah |
| Emmet County (Iowa) | Iowa |
| Emmet County (Michigan) | Michigan |
| Emmons County | North Dakota |
| Emporia city | Virginia |
| Erath County | Texas |
| Erie County (New York) | New York |
| Erie County (Ohio) | Ohio |
| Erie County (Pennsylvania) | Pennsylvania |
| Escambia County (Alabama) | Alabama |
| Escambia County (Florida) | Florida |
| Esmeralda County | Nevada |
| Essex County (Massachusetts) | Massachusetts |
| Essex County (New Jersey) | New Jersey |
| Essex County (New York) | New York |
| Essex County (Vermont) | Vermont |
| Essex County (Virginia) | Virginia |
| Estill County | Kentucky |
| Etowah County | Alabama |
| Eureka County | Nevada |
| Evangeline Parish | Louisiana |
| Evans County | Georgia |
| Fairbanks North Star Borough | Alaska |
| Fairfax County | Virginia |
| Fairfax city | Virginia |
| Fairfield County (Connecticut) | Connecticut |
| Fairfield County (Ohio) | Ohio |
| Fairfield County (South Carolina) | South Carolina |
| Fall River County | South Dakota |
| Fallon County | Montana |
| Falls Church city | Virginia |
| Falls County | Texas |
| Fannin County (Georgia) | Georgia |
| Fannin County (Texas) | Texas |
| Faribault County | Minnesota |
| Faulk County | South Dakota |
| Faulkner County | Arkansas |
| Fauquier County | Virginia |
| Fayette County (Alabama) | Alabama |
| Fayette County (Georgia) | Georgia |
| Fayette County (Illinois) | Illinois |
| Fayette County (Indiana) | Indiana |
| Fayette County (Iowa) | Iowa |
| Fayette County (Kentucky) | Kentucky |
| Fayette County (Ohio) | Ohio |
| Fayette County (Pennsylvania) | Pennsylvania |
| Fayette County (Tennessee) | Tennessee |
| Fayette County (Texas) | Texas |
| Fayette County (West Virginia) | West Virginia |
| Fentress County | Tennessee |
| Fergus County | Montana |
| Ferry County | Washington |
| Fillmore County (Minnesota) | Minnesota |
| Fillmore County (Nebraska) | Nebraska |
| Finney County | Kansas |
| Fisher County | Texas |
| Flagler County | Florida |
| Flathead County | Montana |
| Fleming County | Kentucky |
| Florence County (South Carolina) | South Carolina |
| Florence County (Wisconsin) | Wisconsin |
| Floyd County (Georgia) | Georgia |
| Floyd County (Indiana) | Indiana |
| Floyd County (Iowa) | Iowa |
| Floyd County (Kentucky) | Kentucky |
| Floyd County (Texas) | Texas |
| Floyd County (Virginia) | Virginia |
| Fluvanna County | Virginia |
| Foard County | Texas |
| Fond du Lac County | Wisconsin |
| Ford County (Illinois) | Illinois |
| Ford County (Kansas) | Kansas |
| Forest County (Pennsylvania) | Pennsylvania |
| Forest County (Wisconsin) | Wisconsin |
| Forrest County | Mississippi |
| Forsyth County (Georgia) | Georgia |
| Forsyth County (North Carolina) | North Carolina |
| Fort Bend County | Texas |
| Foster County | North Dakota |
| Fountain County | Indiana |
| Franklin County (Alabama) | Alabama |
| Franklin County (Arkansas) | Arkansas |
| Franklin County (Florida) | Florida |
| Franklin County (Georgia) | Georgia |
| Franklin County (Idaho) | Idaho |
| Franklin County (Illinois) | Illinois |
| Franklin County (Indiana) | Indiana |
| Franklin County (Iowa) | Iowa |
| Franklin County (Kansas) | Kansas |
| Franklin County (Kentucky) | Kentucky |
| Franklin County (Maine) | Maine |
| Franklin County (Massachusetts) | Massachusetts |
| Franklin County (Mississippi) | Mississippi |
| Franklin County (Missouri) | Missouri |
| Franklin County (Nebraska) | Nebraska |
| Franklin County (New York) | New York |
| Franklin County (North Carolina) | North Carolina |
| Franklin County (Ohio) | Ohio |
| Franklin County (Pennsylvania) | Pennsylvania |
| Franklin County (Tennessee) | Tennessee |
| Franklin County (Texas) | Texas |
| Franklin County (Vermont) | Vermont |
| Franklin County (Virginia) | Virginia |
| Franklin County (Washington) | Washington |
| Franklin Parish | Louisiana |
| Franklin city | Virginia |
| Frederick County (Maryland) | Maryland |
| Frederick County (Virginia) | Virginia |
| Fredericksburg city | Virginia |
| Freeborn County | Minnesota |
| Freestone County | Texas |
| Fremont County (Colorado) | Colorado |
| Fremont County (Idaho) | Idaho |
| Fremont County (Iowa) | Iowa |
| Fremont County (Wyoming) | Wyoming |
| Fresno County | California |
| Frio County | Texas |
| Frontier County | Nebraska |
| Fulton County (Arkansas) | Arkansas |
| Fulton County (Georgia) | Georgia |
| Fulton County (Illinois) | Illinois |
| Fulton County (Indiana) | Indiana |
| Fulton County (Kentucky) | Kentucky |
| Fulton County (New York) | New York |
| Fulton County (Ohio) | Ohio |
| Fulton County (Pennsylvania) | Pennsylvania |
| Furnas County | Nebraska |
| Gadsden County | Florida |
| Gage County | Nebraska |
| Gaines County | Texas |
| Galax city | Virginia |
| Gallatin County (Illinois) | Illinois |
| Gallatin County (Kentucky) | Kentucky |
| Gallatin County (Montana) | Montana |
| Gallia County | Ohio |
| Galveston County | Texas |
| Garden County | Nebraska |
| Garfield County (Colorado) | Colorado |
| Garfield County (Montana) | Montana |
| Garfield County (Nebraska) | Nebraska |
| Garfield County (Oklahoma) | Oklahoma |
| Garfield County (Utah) | Utah |
| Garfield County (Washington) | Washington |
| Garland County | Arkansas |
| Garrard County | Kentucky |
| Garrett County | Maryland |
| Garvin County | Oklahoma |
| Garza County | Texas |
| Gasconade County | Missouri |
| Gaston County | North Carolina |
| Gates County | North Carolina |
| Geary County | Kansas |
| Geauga County | Ohio |
| Gem County | Idaho |
| Genesee County (Michigan) | Michigan |
| Genesee County (New York) | New York |
| Geneva County | Alabama |
| Gentry County | Missouri |
| George County | Mississippi |
| Georgetown County | South Carolina |
| Gibson County (Indiana) | Indiana |
| Gibson County (Tennessee) | Tennessee |
| Gila County | Arizona |
| Gilchrist County | Florida |
| Giles County (Tennessee) | Tennessee |
| Giles County (Virginia) | Virginia |
| Gillespie County | Texas |
| Gilliam County | Oregon |
| Gilmer County (Georgia) | Georgia |
| Gilmer County (West Virginia) | West Virginia |
| Gilpin County | Colorado |
| Glacier County | Montana |
| Glades County | Florida |
| Gladwin County | Michigan |
| Glascock County | Georgia |
| Glasscock County | Texas |
| Glenn County | California |
| Gloucester County (New Jersey) | New Jersey |
| Gloucester County (Virginia) | Virginia |
| Glynn County | Georgia |
| Gogebic County | Michigan |
| Golden Valley County (Montana) | Montana |
| Golden Valley County (North Dakota) | North Dakota |
| Goliad County | Texas |
| Gonzales County | Texas |
| Goochland County | Virginia |
| Goodhue County | Minnesota |
| Gooding County | Idaho |
| Gordon County | Georgia |
| Goshen County | Wyoming |
| Gosper County | Nebraska |
| Gove County | Kansas |
| Grady County (Georgia) | Georgia |
| Grady County (Oklahoma) | Oklahoma |
| Grafton County | New Hampshire |
| Graham County (Arizona) | Arizona |
| Graham County (Kansas) | Kansas |
| Graham County (North Carolina) | North Carolina |
| Grainger County | Tennessee |
| Grand County (Colorado) | Colorado |
| Grand County (Utah) | Utah |
| Grand Forks County | North Dakota |
| Grand Isle County | Vermont |
| Grand Traverse County | Michigan |
| Granite County | Montana |
| Grant County (Arkansas) | Arkansas |
| Grant County (Indiana) | Indiana |
| Grant County (Kansas) | Kansas |
| Grant County (Kentucky) | Kentucky |
| Grant County (Minnesota) | Minnesota |
| Grant County (Nebraska) | Nebraska |
| Grant County (New Mexico) | New Mexico |
| Grant County (North Dakota) | North Dakota |
| Grant County (Oklahoma) | Oklahoma |
| Grant County (Oregon) | Oregon |
| Grant County (South Dakota) | South Dakota |
| Grant County (Washington) | Washington |
| Grant County (West Virginia) | West Virginia |
| Grant County (Wisconsin) | Wisconsin |
| Grant Parish | Louisiana |
| Granville County | North Carolina |
| Gratiot County | Michigan |
| Graves County | Kentucky |
| Gray County (Kansas) | Kansas |
| Gray County (Texas) | Texas |
| Grays Harbor County | Washington |
| Grayson County (Kentucky) | Kentucky |
| Grayson County (Texas) | Texas |
| Grayson County (Virginia) | Virginia |
| Greeley County (Kansas) | Kansas |
| Greeley County (Nebraska) | Nebraska |
| Green County (Kentucky) | Kentucky |
| Green County (Wisconsin) | Wisconsin |
| Green Lake County | Wisconsin |
| Greenbrier County | West Virginia |
| Greene County (Alabama) | Alabama |
| Greene County (Arkansas) | Arkansas |
| Greene County (Georgia) | Georgia |
| Greene County (Illinois) | Illinois |
| Greene County (Indiana) | Indiana |
| Greene County (Iowa) | Iowa |
| Greene County (Mississippi) | Mississippi |
| Greene County (Missouri) | Missouri |
| Greene County (New York) | New York |
| Greene County (North Carolina) | North Carolina |
| Greene County (Ohio) | Ohio |
| Greene County (Pennsylvania) | Pennsylvania |
| Greene County (Tennessee) | Tennessee |
| Greene County (Virginia) | Virginia |
| Greenlee County | Arizona |
| Greensville County | Virginia |
| Greenup County | Kentucky |
| Greenville County | South Carolina |
| Greenwood County (Kansas) | Kansas |
| Greenwood County (South Carolina) | South Carolina |
| Greer County | Oklahoma |
| Gregg County | Texas |
| Gregory County | South Dakota |
| Grenada County | Mississippi |
| Griggs County | North Dakota |
| Grimes County | Texas |
| Grundy County (Illinois) | Illinois |
| Grundy County (Iowa) | Iowa |
| Grundy County (Missouri) | Missouri |
| Grundy County (Tennessee) | Tennessee |
| Guadalupe County (New Mexico) | New Mexico |
| Guadalupe County (Texas) | Texas |
| Guernsey County | Ohio |
| Guilford County | North Carolina |
| Gulf County | Florida |
| Gunnison County | Colorado |
| Guthrie County | Iowa |
| Gwinnett County | Georgia |
| Haakon County | South Dakota |
| Habersham County | Georgia |
| Haines Borough | Alaska |
| Hale County (Alabama) | Alabama |
| Hale County (Texas) | Texas |
| Halifax County (North Carolina) | North Carolina |
| Halifax County (Virginia) | Virginia |
| Hall County (Georgia) | Georgia |
| Hall County (Nebraska) | Nebraska |
| Hall County (Texas) | Texas |
| Hamblen County | Tennessee |
| Hamilton County (Florida) | Florida |
| Hamilton County (Illinois) | Illinois |
| Hamilton County (Indiana) | Indiana |
| Hamilton County (Iowa) | Iowa |
| Hamilton County (Kansas) | Kansas |
| Hamilton County (Nebraska) | Nebraska |
| Hamilton County (New York) | New York |
| Hamilton County (Ohio) | Ohio |
| Hamilton County (Tennessee) | Tennessee |
| Hamilton County (Texas) | Texas |
| Hamlin County | South Dakota |
| Hampden County | Massachusetts |
| Hampshire County (Massachusetts) | Massachusetts |
| Hampshire County (West Virginia) | West Virginia |
| Hampton County | South Carolina |
| Hampton city | Virginia |
| Hancock County (Georgia) | Georgia |
| Hancock County (Illinois) | Illinois |
| Hancock County (Indiana) | Indiana |
| Hancock County (Iowa) | Iowa |
| Hancock County (Kentucky) | Kentucky |
| Hancock County (Maine) | Maine |
| Hancock County (Mississippi) | Mississippi |
| Hancock County (Ohio) | Ohio |
| Hancock County (Tennessee) | Tennessee |
| Hancock County (West Virginia) | West Virginia |
| Hand County | South Dakota |
| Hanover County | Virginia |
| Hansford County | Texas |
| Hanson County | South Dakota |
| Haralson County | Georgia |
| Hardee County | Florida |
| Hardeman County (Tennessee) | Tennessee |
| Hardeman County (Texas) | Texas |
| Hardin County (Illinois) | Illinois |
| Hardin County (Iowa) | Iowa |
| Hardin County (Kentucky) | Kentucky |
| Hardin County (Ohio) | Ohio |
| Hardin County (Tennessee) | Tennessee |
| Hardin County (Texas) | Texas |
| Harding County (New Mexico) | New Mexico |
| Harding County (South Dakota) | South Dakota |
| Hardy County | West Virginia |
| Harford County | Maryland |
| Harlan County (Kentucky) | Kentucky |
| Harlan County (Nebraska) | Nebraska |
| Harmon County | Oklahoma |
| Harnett County | North Carolina |
| Harney County | Oregon |
| Harper County (Kansas) | Kansas |
| Harper County (Oklahoma) | Oklahoma |
| Harris County (Georgia) | Georgia |
| Harris County (Texas) | Texas |
| Harrison County (Indiana) | Indiana |
| Harrison County (Iowa) | Iowa |
| Harrison County (Kentucky) | Kentucky |
| Harrison County (Mississippi) | Mississippi |
| Harrison County (Missouri) | Missouri |
| Harrison County (Ohio) | Ohio |
| Harrison County (Texas) | Texas |
| Harrison County (West Virginia) | West Virginia |
| Harrisonburg city | Virginia |
| Hart County (Georgia) | Georgia |
| Hart County (Kentucky) | Kentucky |
| Hartford County | Connecticut |
| Hartley County | Texas |
| Harvey County | Kansas |
| Haskell County (Kansas) | Kansas |
| Haskell County (Oklahoma) | Oklahoma |
| Haskell County (Texas) | Texas |
| Hawaii County | Hawaii |
| Hawkins County | Tennessee |
| Hayes County | Nebraska |
| Hays County | Texas |
| Haywood County (North Carolina) | North Carolina |
| Haywood County (Tennessee) | Tennessee |
| Heard County | Georgia |
| Hemphill County | Texas |
| Hempstead County | Arkansas |
| Henderson County (Illinois) | Illinois |
| Henderson County (Kentucky) | Kentucky |
| Henderson County (North Carolina) | North Carolina |
| Henderson County (Tennessee) | Tennessee |
| Henderson County (Texas) | Texas |
| Hendricks County | Indiana |
| Hendry County | Florida |
| Hennepin County | Minnesota |
| Henrico County | Virginia |
| Henry County (Alabama) | Alabama |
| Henry County (Georgia) | Georgia |
| Henry County (Illinois) | Illinois |
| Henry County (Indiana) | Indiana |
| Henry County (Iowa) | Iowa |
| Henry County (Kentucky) | Kentucky |
| Henry County (Missouri) | Missouri |
| Henry County (Ohio) | Ohio |
| Henry County (Tennessee) | Tennessee |
| Henry County (Virginia) | Virginia |
| Herkimer County | New York |
| Hernando County | Florida |
| Hertford County | North Carolina |
| Hettinger County | North Dakota |
| Hickman County (Kentucky) | Kentucky |
| Hickman County (Tennessee) | Tennessee |
| Hickory County | Missouri |
| Hidalgo County (New Mexico) | New Mexico |
| Hidalgo County (Texas) | Texas |
| Highland County (Ohio) | Ohio |
| Highland County (Virginia) | Virginia |
| Highlands County | Florida |
| Hill County (Montana) | Montana |
| Hill County (Texas) | Texas |
| Hillsborough County (Florida) | Florida |
| Hillsborough County (New Hampshire) | New Hampshire |
| Hillsdale County | Michigan |
| Hinds County | Mississippi |
| Hinsdale County | Colorado |
| Hitchcock County | Nebraska |
| Hocking County | Ohio |
| Hockley County | Texas |
| Hodgeman County | Kansas |
| Hoke County | North Carolina |
| Holmes County (Florida) | Florida |
| Holmes County (Mississippi) | Mississippi |
| Holmes County (Ohio) | Ohio |
| Holt County (Missouri) | Missouri |
| Holt County (Nebraska) | Nebraska |
| Honolulu County | Hawaii |
| Hood County | Texas |
| Hood River County | Oregon |
| Hooker County | Nebraska |
| Hoonah-Angoon Census Area | Alaska |
| Hopewell city | Virginia |
| Hopkins County (Kentucky) | Kentucky |
| Hopkins County (Texas) | Texas |
| Horry County | South Carolina |
| Hot Spring County | Arkansas |
| Hot Springs County | Wyoming |
| Houghton County | Michigan |
| Houston County (Alabama) | Alabama |
| Houston County (Georgia) | Georgia |
| Houston County (Minnesota) | Minnesota |
| Houston County (Tennessee) | Tennessee |
| Houston County (Texas) | Texas |
| Howard County (Arkansas) | Arkansas |
| Howard County (Indiana) | Indiana |
| Howard County (Iowa) | Iowa |
| Howard County (Maryland) | Maryland |
| Howard County (Missouri) | Missouri |
| Howard County (Nebraska) | Nebraska |
| Howard County (Texas) | Texas |
| Howell County | Missouri |
| Hubbard County | Minnesota |
| Hudson County | New Jersey |
| Hudspeth County | Texas |
| Huerfano County | Colorado |
| Hughes County (Oklahoma) | Oklahoma |
| Hughes County (South Dakota) | South Dakota |
| Humboldt County (California) | California |
| Humboldt County (Iowa) | Iowa |
| Humboldt County (Nevada) | Nevada |
| Humphreys County (Mississippi) | Mississippi |
| Humphreys County (Tennessee) | Tennessee |
| Hunt County | Texas |
| Hunterdon County | New Jersey |
| Huntingdon County | Pennsylvania |
| Huntington County | Indiana |
| Huron County (Michigan) | Michigan |
| Huron County (Ohio) | Ohio |
| Hutchinson County (South Dakota) | South Dakota |
| Hutchinson County (Texas) | Texas |
| Hyde County (North Carolina) | North Carolina |
| Hyde County (South Dakota) | South Dakota |
| Iberia Parish | Louisiana |
| Iberville Parish | Louisiana |
| Ida County | Iowa |
| Idaho County | Idaho |
| Imperial County | California |
| Independence County | Arkansas |
| Indian River County | Florida |
| Indiana County | Pennsylvania |
| Ingham County | Michigan |
| Inyo County | California |
| Ionia County | Michigan |
| Iosco County | Michigan |
| Iowa County (Iowa) | Iowa |
| Iowa County (Wisconsin) | Wisconsin |
| Iredell County | North Carolina |
| Irion County | Texas |
| Iron County (Michigan) | Michigan |
| Iron County (Missouri) | Missouri |
| Iron County (Utah) | Utah |
| Iron County (Wisconsin) | Wisconsin |
| Iroquois County | Illinois |
| Irwin County | Georgia |
| Isabella County | Michigan |
| Isanti County | Minnesota |
| Island County | Washington |
| Isle of Wight County | Virginia |
| Issaquena County | Mississippi |
| Itasca County | Minnesota |
| Itawamba County | Mississippi |
| Izard County | Arkansas |
| Jack County | Texas |
| Jackson County (Alabama) | Alabama |
| Jackson County (Arkansas) | Arkansas |
| Jackson County (Colorado) | Colorado |
| Jackson County (Florida) | Florida |
| Jackson County (Georgia) | Georgia |
| Jackson County (Illinois) | Illinois |
| Jackson County (Indiana) | Indiana |
| Jackson County (Iowa) | Iowa |
| Jackson County (Kansas) | Kansas |
| Jackson County (Kentucky) | Kentucky |
| Jackson County (Michigan) | Michigan |
| Jackson County (Minnesota) | Minnesota |
| Jackson County (Mississippi) | Mississippi |
| Jackson County (Missouri) | Missouri |
| Jackson County (North Carolina) | North Carolina |
| Jackson County (Ohio) | Ohio |
| Jackson County (Oklahoma) | Oklahoma |
| Jackson County (Oregon) | Oregon |
| Jackson County (South Dakota) | South Dakota |
| Jackson County (Tennessee) | Tennessee |
| Jackson County (Texas) | Texas |
| Jackson County (West Virginia) | West Virginia |
| Jackson County (Wisconsin) | Wisconsin |
| Jackson Parish | Louisiana |
| James City County | Virginia |
| Jasper County (Georgia) | Georgia |
| Jasper County (Illinois) | Illinois |
| Jasper County (Indiana) | Indiana |
| Jasper County (Iowa) | Iowa |
| Jasper County (Mississippi) | Mississippi |
| Jasper County (Missouri) | Missouri |
| Jasper County (South Carolina) | South Carolina |
| Jasper County (Texas) | Texas |
| Jay County | Indiana |
| Jeff Davis County (Georgia) | Georgia |
| Jeff Davis County (Texas) | Texas |
| Jefferson County (Alabama) | Alabama |
| Jefferson County (Arkansas) | Arkansas |
| Jefferson County (Colorado) | Colorado |
| Jefferson County (Florida) | Florida |
| Jefferson County (Georgia) | Georgia |
| Jefferson County (Idaho) | Idaho |
| Jefferson County (Illinois) | Illinois |
| Jefferson County (Indiana) | Indiana |
| Jefferson County (Iowa) | Iowa |
| Jefferson County (Kansas) | Kansas |
| Jefferson County (Kentucky) | Kentucky |
| Jefferson County (Mississippi) | Mississippi |
| Jefferson County (Missouri) | Missouri |
| Jefferson County (Montana) | Montana |
| Jefferson County (Nebraska) | Nebraska |
| Jefferson County (New York) | New York |
| Jefferson County (Ohio) | Ohio |
| Jefferson County (Oklahoma) | Oklahoma |
| Jefferson County (Oregon) | Oregon |
| Jefferson County (Pennsylvania) | Pennsylvania |
| Jefferson County (Tennessee) | Tennessee |
| Jefferson County (Texas) | Texas |
| Jefferson County (Washington) | Washington |
| Jefferson County (West Virginia) | West Virginia |
| Jefferson County (Wisconsin) | Wisconsin |
| Jefferson Davis County | Mississippi |
| Jefferson Davis Parish | Louisiana |
| Jefferson Parish | Louisiana |
| Jenkins County | Georgia |
| Jennings County | Indiana |
| Jerauld County | South Dakota |
| Jerome County | Idaho |
| Jersey County | Illinois |
| Jessamine County | Kentucky |
| Jewell County | Kansas |
| Jim Hogg County | Texas |
| Jim Wells County | Texas |
| Jo Daviess County | Illinois |
| Johnson County (Arkansas) | Arkansas |
| Johnson County (Georgia) | Georgia |
| Johnson County (Illinois) | Illinois |
| Johnson County (Indiana) | Indiana |
| Johnson County (Iowa) | Iowa |
| Johnson County (Kansas) | Kansas |
| Johnson County (Kentucky) | Kentucky |
| Johnson County (Missouri) | Missouri |
| Johnson County (Nebraska) | Nebraska |
| Johnson County (Tennessee) | Tennessee |
| Johnson County (Texas) | Texas |
| Johnson County (Wyoming) | Wyoming |
| Johnston County (North Carolina) | North Carolina |
| Johnston County (Oklahoma) | Oklahoma |
| Jones County (Georgia) | Georgia |
| Jones County (Iowa) | Iowa |
| Jones County (Mississippi) | Mississippi |
| Jones County (North Carolina) | North Carolina |
| Jones County (South Dakota) | South Dakota |
| Jones County (Texas) | Texas |
| Josephine County | Oregon |
| Juab County | Utah |
| Judith Basin County | Montana |
| Juneau City and Borough | Alaska |
| Juneau County | Wisconsin |
| Juniata County | Pennsylvania |
| Kalamazoo County | Michigan |
| Kalawao County | Hawaii |
| Kalkaska County | Michigan |
| Kanabec County | Minnesota |
| Kanawha County | West Virginia |
| Kandiyohi County | Minnesota |
| Kane County (Illinois) | Illinois |
| Kane County (Utah) | Utah |
| Kankakee County | Illinois |
| Karnes County | Texas |
| Kauai County | Hawaii |
| Kaufman County | Texas |
| Kay County | Oklahoma |
| Kearney County | Nebraska |
| Kearny County | Kansas |
| Keith County | Nebraska |
| Kemper County | Mississippi |
| Kenai Peninsula Borough | Alaska |
| Kendall County (Illinois) | Illinois |
| Kendall County (Texas) | Texas |
| Kenedy County | Texas |
| Kennebec County | Maine |
| Kenosha County | Wisconsin |
| Kent County (Delaware) | Delaware |
| Kent County (Maryland) | Maryland |
| Kent County (Michigan) | Michigan |
| Kent County (Rhode Island) | Rhode Island |
| Kent County (Texas) | Texas |
| Kenton County | Kentucky |
| Keokuk County | Iowa |
| Kern County | California |
| Kerr County | Texas |
| Kershaw County | South Carolina |
| Ketchikan Gateway Borough | Alaska |
| Kewaunee County | Wisconsin |
| Keweenaw County | Michigan |
| Keya Paha County | Nebraska |
| Kidder County | North Dakota |
| Kimball County | Nebraska |
| Kimble County | Texas |
| King County (Texas) | Texas |
| King County (Washington) | Washington |
| King George County | Virginia |
| King William County | Virginia |
| King and Queen County | Virginia |
| Kingfisher County | Oklahoma |
| Kingman County | Kansas |
| Kings County (California) | California |
| Kings County (New York) | New York |
| Kingsbury County | South Dakota |
| Kinney County | Texas |
| Kiowa County (Colorado) | Colorado |
| Kiowa County (Kansas) | Kansas |
| Kiowa County (Oklahoma) | Oklahoma |
| Kit Carson County | Colorado |
| Kitsap County | Washington |
| Kittitas County | Washington |
| Kittson County | Minnesota |
| Klamath County | Oregon |
| Kleberg County | Texas |
| Klickitat County | Washington |
| Knott County | Kentucky |
| Knox County (Illinois) | Illinois |
| Knox County (Indiana) | Indiana |
| Knox County (Kentucky) | Kentucky |
| Knox County (Maine) | Maine |
| Knox County (Missouri) | Missouri |
| Knox County (Nebraska) | Nebraska |
| Knox County (Ohio) | Ohio |
| Knox County (Tennessee) | Tennessee |
| Knox County (Texas) | Texas |
| Kodiak Island Borough | Alaska |
| Koochiching County | Minnesota |
| Kootenai County | Idaho |
| Kosciusko County | Indiana |
| Kossuth County | Iowa |
| Kusilvak Census Area | Alaska |
| La Crosse County | Wisconsin |
| La Paz County | Arizona |
| La Plata County | Colorado |
| La Salle County | Texas |
| LaGrange County | Indiana |
| LaMoure County | North Dakota |
| LaPorte County | Indiana |
| LaSalle County | Illinois |
| LaSalle Parish | Louisiana |
| Labette County | Kansas |
| Lac qui Parle County | Minnesota |
| Lackawanna County | Pennsylvania |
| Laclede County | Missouri |
| Lafayette County (Arkansas) | Arkansas |
| Lafayette County (Florida) | Florida |
| Lafayette County (Mississippi) | Mississippi |
| Lafayette County (Missouri) | Missouri |
| Lafayette County (Wisconsin) | Wisconsin |
| Lafayette Parish | Louisiana |
| Lafourche Parish | Louisiana |
| Lake County (California) | California |
| Lake County (Colorado) | Colorado |
| Lake County (Florida) | Florida |
| Lake County (Illinois) | Illinois |
| Lake County (Indiana) | Indiana |
| Lake County (Michigan) | Michigan |
| Lake County (Minnesota) | Minnesota |
| Lake County (Montana) | Montana |
| Lake County (Ohio) | Ohio |
| Lake County (Oregon) | Oregon |
| Lake County (South Dakota) | South Dakota |
| Lake County (Tennessee) | Tennessee |
| Lake and Peninsula Borough | Alaska |
| Lake of the Woods County | Minnesota |
| Lamar County (Alabama) | Alabama |
| Lamar County (Georgia) | Georgia |
| Lamar County (Mississippi) | Mississippi |
| Lamar County (Texas) | Texas |
| Lamb County | Texas |
| Lamoille County | Vermont |
| Lampasas County | Texas |
| Lancaster County (Nebraska) | Nebraska |
| Lancaster County (Pennsylvania) | Pennsylvania |
| Lancaster County (South Carolina) | South Carolina |
| Lancaster County (Virginia) | Virginia |
| Lander County | Nevada |
| Lane County (Kansas) | Kansas |
| Lane County (Oregon) | Oregon |
| Langlade County | Wisconsin |
| Lanier County | Georgia |
| Lapeer County | Michigan |
| Laramie County | Wyoming |
| Larimer County | Colorado |
| Larue County | Kentucky |
| Las Animas County | Colorado |
| Lassen County | California |
| Latah County | Idaho |
| Latimer County | Oklahoma |
| Lauderdale County (Alabama) | Alabama |
| Lauderdale County (Mississippi) | Mississippi |
| Lauderdale County (Tennessee) | Tennessee |
| Laurel County | Kentucky |
| Laurens County (Georgia) | Georgia |
| Laurens County (South Carolina) | South Carolina |
| Lavaca County | Texas |
| Lawrence County (Alabama) | Alabama |
| Lawrence County (Arkansas) | Arkansas |
| Lawrence County (Illinois) | Illinois |
| Lawrence County (Indiana) | Indiana |
| Lawrence County (Kentucky) | Kentucky |
| Lawrence County (Mississippi) | Mississippi |
| Lawrence County (Missouri) | Missouri |
| Lawrence County (Ohio) | Ohio |
| Lawrence County (Pennsylvania) | Pennsylvania |
| Lawrence County (South Dakota) | South Dakota |
| Lawrence County (Tennessee) | Tennessee |
| Le Flore County | Oklahoma |
| Le Sueur County | Minnesota |
| Lea County | New Mexico |
| Leake County | Mississippi |
| Leavenworth County | Kansas |
| Lebanon County | Pennsylvania |
| Lee County (Alabama) | Alabama |
| Lee County (Arkansas) | Arkansas |
| Lee County (Florida) | Florida |
| Lee County (Georgia) | Georgia |
| Lee County (Illinois) | Illinois |
| Lee County (Iowa) | Iowa |
| Lee County (Kentucky) | Kentucky |
| Lee County (Mississippi) | Mississippi |
| Lee County (North Carolina) | North Carolina |
| Lee County (South Carolina) | South Carolina |
| Lee County (Texas) | Texas |
| Lee County (Virginia) | Virginia |
| Leelanau County | Michigan |
| Leflore County | Mississippi |
| Lehigh County | Pennsylvania |
| Lemhi County | Idaho |
| Lenawee County | Michigan |
| Lenoir County | North Carolina |
| Leon County (Florida) | Florida |
| Leon County (Texas) | Texas |
| Leslie County | Kentucky |
| Letcher County | Kentucky |
| Levy County | Florida |
| Lewis County (Idaho) | Idaho |
| Lewis County (Kentucky) | Kentucky |
| Lewis County (Missouri) | Missouri |
| Lewis County (New York) | New York |
| Lewis County (Tennessee) | Tennessee |
| Lewis County (Washington) | Washington |
| Lewis County (West Virginia) | West Virginia |
| Lewis and Clark County | Montana |
| Lexington County | South Carolina |
| Lexington city | Virginia |
| Liberty County (Florida) | Florida |
| Liberty County (Georgia) | Georgia |
| Liberty County (Montana) | Montana |
| Liberty County (Texas) | Texas |
| Licking County | Ohio |
| Limestone County (Alabama) | Alabama |
| Limestone County (Texas) | Texas |
| Lincoln County (Arkansas) | Arkansas |
| Lincoln County (Colorado) | Colorado |
| Lincoln County (Georgia) | Georgia |
| Lincoln County (Idaho) | Idaho |
| Lincoln County (Kansas) | Kansas |
| Lincoln County (Kentucky) | Kentucky |
| Lincoln County (Maine) | Maine |
| Lincoln County (Minnesota) | Minnesota |
| Lincoln County (Mississippi) | Mississippi |
| Lincoln County (Missouri) | Missouri |
| Lincoln County (Montana) | Montana |
| Lincoln County (Nebraska) | Nebraska |
| Lincoln County (Nevada) | Nevada |
| Lincoln County (New Mexico) | New Mexico |
| Lincoln County (North Carolina) | North Carolina |
| Lincoln County (Oklahoma) | Oklahoma |
| Lincoln County (Oregon) | Oregon |
| Lincoln County (South Dakota) | South Dakota |
| Lincoln County (Tennessee) | Tennessee |
| Lincoln County (Washington) | Washington |
| Lincoln County (West Virginia) | West Virginia |
| Lincoln County (Wisconsin) | Wisconsin |
| Lincoln County (Wyoming) | Wyoming |
| Lincoln Parish | Louisiana |
| Linn County (Iowa) | Iowa |
| Linn County (Kansas) | Kansas |
| Linn County (Missouri) | Missouri |
| Linn County (Oregon) | Oregon |
| Lipscomb County | Texas |
| Litchfield County | Connecticut |
| Little River County | Arkansas |
| Live Oak County | Texas |
| Livingston County (Illinois) | Illinois |
| Livingston County (Kentucky) | Kentucky |
| Livingston County (Michigan) | Michigan |
| Livingston County (Missouri) | Missouri |
| Livingston County (New York) | New York |
| Livingston Parish | Louisiana |
| Llano County | Texas |
| Logan County (Arkansas) | Arkansas |
| Logan County (Colorado) | Colorado |
| Logan County (Illinois) | Illinois |
| Logan County (Kansas) | Kansas |
| Logan County (Kentucky) | Kentucky |
| Logan County (Nebraska) | Nebraska |
| Logan County (North Dakota) | North Dakota |
| Logan County (Ohio) | Ohio |
| Logan County (Oklahoma) | Oklahoma |
| Logan County (West Virginia) | West Virginia |
| Long County | Georgia |
| Lonoke County | Arkansas |
| Lorain County | Ohio |
| Los Alamos County | New Mexico |
| Los Angeles County | California |
| Loudon County | Tennessee |
| Loudoun County | Virginia |
| Louisa County (Iowa) | Iowa |
| Louisa County (Virginia) | Virginia |
| Loup County | Nebraska |
| Love County | Oklahoma |
| Loving County | Texas |
| Lowndes County (Alabama) | Alabama |
| Lowndes County (Georgia) | Georgia |
| Lowndes County (Mississippi) | Mississippi |
| Lubbock County | Texas |
| Lucas County (Iowa) | Iowa |
| Lucas County (Ohio) | Ohio |
| Luce County | Michigan |
| Lumpkin County | Georgia |
| Luna County | New Mexico |
| Lunenburg County | Virginia |
| Luzerne County | Pennsylvania |
| Lycoming County | Pennsylvania |
| Lyman County | South Dakota |
| Lynchburg city | Virginia |
| Lynn County | Texas |
| Lyon County (Iowa) | Iowa |
| Lyon County (Kansas) | Kansas |
| Lyon County (Kentucky) | Kentucky |
| Lyon County (Minnesota) | Minnesota |
| Lyon County (Nevada) | Nevada |
| Mackinac County | Michigan |
| Macomb County | Michigan |
| Macon County (Alabama) | Alabama |
| Macon County (Georgia) | Georgia |
| Macon County (Illinois) | Illinois |
| Macon County (Missouri) | Missouri |
| Macon County (North Carolina) | North Carolina |
| Macon County (Tennessee) | Tennessee |
| Macoupin County | Illinois |
| Madera County | California |
| Madison County (Alabama) | Alabama |
| Madison County (Arkansas) | Arkansas |
| Madison County (Florida) | Florida |
| Madison County (Georgia) | Georgia |
| Madison County (Idaho) | Idaho |
| Madison County (Illinois) | Illinois |
| Madison County (Indiana) | Indiana |
| Madison County (Iowa) | Iowa |
| Madison County (Kentucky) | Kentucky |
| Madison County (Mississippi) | Mississippi |
| Madison County (Missouri) | Missouri |
| Madison County (Montana) | Montana |
| Madison County (Nebraska) | Nebraska |
| Madison County (New York) | New York |
| Madison County (North Carolina) | North Carolina |
| Madison County (Ohio) | Ohio |
| Madison County (Tennessee) | Tennessee |
| Madison County (Texas) | Texas |
| Madison County (Virginia) | Virginia |
| Madison Parish | Louisiana |
| Magoffin County | Kentucky |
| Mahaska County | Iowa |
| Mahnomen County | Minnesota |
| Mahoning County | Ohio |
| Major County | Oklahoma |
| Malheur County | Oregon |
| Manassas Park city | Virginia |
| Manassas city | Virginia |
| Manatee County | Florida |
| Manistee County | Michigan |
| Manitowoc County | Wisconsin |
| Marathon County | Wisconsin |
| Marengo County | Alabama |
| Maricopa County | Arizona |
| Maries County | Missouri |
| Marin County | California |
| Marinette County | Wisconsin |
| Marion County (Alabama) | Alabama |
| Marion County (Arkansas) | Arkansas |
| Marion County (Florida) | Florida |
| Marion County (Georgia) | Georgia |
| Marion County (Illinois) | Illinois |
| Marion County (Indiana) | Indiana |
| Marion County (Iowa) | Iowa |
| Marion County (Kansas) | Kansas |
| Marion County (Kentucky) | Kentucky |
| Marion County (Mississippi) | Mississippi |
| Marion County (Missouri) | Missouri |
| Marion County (Ohio) | Ohio |
| Marion County (Oregon) | Oregon |
| Marion County (South Carolina) | South Carolina |
| Marion County (Tennessee) | Tennessee |
| Marion County (Texas) | Texas |
| Marion County (West Virginia) | West Virginia |
| Mariposa County | California |
| Marlboro County | South Carolina |
| Marquette County (Michigan) | Michigan |
| Marquette County (Wisconsin) | Wisconsin |
| Marshall County (Alabama) | Alabama |
| Marshall County (Illinois) | Illinois |
| Marshall County (Indiana) | Indiana |
| Marshall County (Iowa) | Iowa |
| Marshall County (Kansas) | Kansas |
| Marshall County (Kentucky) | Kentucky |
| Marshall County (Minnesota) | Minnesota |
| Marshall County (Mississippi) | Mississippi |
| Marshall County (Oklahoma) | Oklahoma |
| Marshall County (South Dakota) | South Dakota |
| Marshall County (Tennessee) | Tennessee |
| Marshall County (West Virginia) | West Virginia |
| Martin County (Florida) | Florida |
| Martin County (Indiana) | Indiana |
| Martin County (Kentucky) | Kentucky |
| Martin County (Minnesota) | Minnesota |
| Martin County (North Carolina) | North Carolina |
| Martin County (Texas) | Texas |
| Martinsville city | Virginia |
| Mason County (Illinois) | Illinois |
| Mason County (Kentucky) | Kentucky |
| Mason County (Michigan) | Michigan |
| Mason County (Texas) | Texas |
| Mason County (Washington) | Washington |
| Mason County (West Virginia) | West Virginia |
| Massac County | Illinois |
| Matagorda County | Texas |
| Matanuska-Susitna Borough | Alaska |
| Mathews County | Virginia |
| Maui County | Hawaii |
| Maury County | Tennessee |
| Maverick County | Texas |
| Mayes County | Oklahoma |
| McClain County | Oklahoma |
| McCone County | Montana |
| McCook County | South Dakota |
| McCormick County | South Carolina |
| McCracken County | Kentucky |
| McCreary County | Kentucky |
| McCulloch County | Texas |
| McCurtain County | Oklahoma |
| McDonald County | Missouri |
| McDonough County | Illinois |
| McDowell County (North Carolina) | North Carolina |
| McDowell County (West Virginia) | West Virginia |
| McDuffie County | Georgia |
| McHenry County (Illinois) | Illinois |
| McHenry County (North Dakota) | North Dakota |
| McIntosh County (Georgia) | Georgia |
| McIntosh County (North Dakota) | North Dakota |
| McIntosh County (Oklahoma) | Oklahoma |
| McKean County | Pennsylvania |
| McKenzie County | North Dakota |
| McKinley County | New Mexico |
| McLean County (Illinois) | Illinois |
| McLean County (Kentucky) | Kentucky |
| McLean County (North Dakota) | North Dakota |
| McLennan County | Texas |
| McLeod County | Minnesota |
| McMinn County | Tennessee |
| McMullen County | Texas |
| McNairy County | Tennessee |
| McPherson County (Kansas) | Kansas |
| McPherson County (Nebraska) | Nebraska |
| McPherson County (South Dakota) | South Dakota |
| Meade County (Kansas) | Kansas |
| Meade County (Kentucky) | Kentucky |
| Meade County (South Dakota) | South Dakota |
| Meagher County | Montana |
| Mecklenburg County (North Carolina) | North Carolina |
| Mecklenburg County (Virginia) | Virginia |
| Mecosta County | Michigan |
| Medina County (Ohio) | Ohio |
| Medina County (Texas) | Texas |
| Meeker County | Minnesota |
| Meigs County (Ohio) | Ohio |
| Meigs County (Tennessee) | Tennessee |
| Mellette County | South Dakota |
| Menard County (Illinois) | Illinois |
| Menard County (Texas) | Texas |
| Mendocino County | California |
| Menifee County | Kentucky |
| Menominee County (Michigan) | Michigan |
| Menominee County (Wisconsin) | Wisconsin |
| Merced County | California |
| Mercer County (Illinois) | Illinois |
| Mercer County (Kentucky) | Kentucky |
| Mercer County (Missouri) | Missouri |
| Mercer County (New Jersey) | New Jersey |
| Mercer County (North Dakota) | North Dakota |
| Mercer County (Ohio) | Ohio |
| Mercer County (Pennsylvania) | Pennsylvania |
| Mercer County (West Virginia) | West Virginia |
| Meriwether County | Georgia |
| Merrick County | Nebraska |
| Merrimack County | New Hampshire |
| Mesa County | Colorado |
| Metcalfe County | Kentucky |
| Miami County (Indiana) | Indiana |
| Miami County (Kansas) | Kansas |
| Miami County (Ohio) | Ohio |
| Miami-Dade County | Florida |
| Middlesex County (Connecticut) | Connecticut |
| Middlesex County (Massachusetts) | Massachusetts |
| Middlesex County (New Jersey) | New Jersey |
| Middlesex County (Virginia) | Virginia |
| Midland County (Michigan) | Michigan |
| Midland County (Texas) | Texas |
| Mifflin County | Pennsylvania |
| Milam County | Texas |
| Millard County | Utah |
| Mille Lacs County | Minnesota |
| Miller County (Arkansas) | Arkansas |
| Miller County (Georgia) | Georgia |
| Miller County (Missouri) | Missouri |
| Mills County (Iowa) | Iowa |
| Mills County (Texas) | Texas |
| Milwaukee County | Wisconsin |
| Miner County | South Dakota |
| Mineral County (Colorado) | Colorado |
| Mineral County (Montana) | Montana |
| Mineral County (Nevada) | Nevada |
| Mineral County (West Virginia) | West Virginia |
| Mingo County | West Virginia |
| Minidoka County | Idaho |
| Minnehaha County | South Dakota |
| Missaukee County | Michigan |
| Mississippi County (Arkansas) | Arkansas |
| Mississippi County (Missouri) | Missouri |
| Missoula County | Montana |
| Mitchell County (Georgia) | Georgia |
| Mitchell County (Iowa) | Iowa |
| Mitchell County (Kansas) | Kansas |
| Mitchell County (North Carolina) | North Carolina |
| Mitchell County (Texas) | Texas |
| Mobile County | Alabama |
| Modoc County | California |
| Moffat County | Colorado |
| Mohave County | Arizona |
| Moniteau County | Missouri |
| Monmouth County | New Jersey |
| Mono County | California |
| Monona County | Iowa |
| Monongalia County | West Virginia |
| Monroe County (Alabama) | Alabama |
| Monroe County (Arkansas) | Arkansas |
| Monroe County (Florida) | Florida |
| Monroe County (Georgia) | Georgia |
| Monroe County (Illinois) | Illinois |
| Monroe County (Indiana) | Indiana |
| Monroe County (Iowa) | Iowa |
| Monroe County (Kentucky) | Kentucky |
| Monroe County (Michigan) | Michigan |
| Monroe County (Mississippi) | Mississippi |
| Monroe County (Missouri) | Missouri |
| Monroe County (New York) | New York |
| Monroe County (Ohio) | Ohio |
| Monroe County (Pennsylvania) | Pennsylvania |
| Monroe County (Tennessee) | Tennessee |
| Monroe County (West Virginia) | West Virginia |
| Monroe County (Wisconsin) | Wisconsin |
| Montague County | Texas |
| Montcalm County | Michigan |
| Monterey County | California |
| Montezuma County | Colorado |
| Montgomery County (Alabama) | Alabama |
| Montgomery County (Arkansas) | Arkansas |
| Montgomery County (Georgia) | Georgia |
| Montgomery County (Illinois) | Illinois |
| Montgomery County (Indiana) | Indiana |
| Montgomery County (Iowa) | Iowa |
| Montgomery County (Kansas) | Kansas |
| Montgomery County (Kentucky) | Kentucky |
| Montgomery County (Maryland) | Maryland |
| Montgomery County (Mississippi) | Mississippi |
| Montgomery County (Missouri) | Missouri |
| Montgomery County (New York) | New York |
| Montgomery County (North Carolina) | North Carolina |
| Montgomery County (Ohio) | Ohio |
| Montgomery County (Pennsylvania) | Pennsylvania |
| Montgomery County (Tennessee) | Tennessee |
| Montgomery County (Texas) | Texas |
| Montgomery County (Virginia) | Virginia |
| Montmorency County | Michigan |
| Montour County | Pennsylvania |
| Montrose County | Colorado |
| Moody County | South Dakota |
| Moore County (North Carolina) | North Carolina |
| Moore County (Tennessee) | Tennessee |
| Moore County (Texas) | Texas |
| Mora County | New Mexico |
| Morehouse Parish | Louisiana |
| Morgan County (Alabama) | Alabama |
| Morgan County (Colorado) | Colorado |
| Morgan County (Georgia) | Georgia |
| Morgan County (Illinois) | Illinois |
| Morgan County (Indiana) | Indiana |
| Morgan County (Kentucky) | Kentucky |
| Morgan County (Missouri) | Missouri |
| Morgan County (Ohio) | Ohio |
| Morgan County (Tennessee) | Tennessee |
| Morgan County (Utah) | Utah |
| Morgan County (West Virginia) | West Virginia |
| Morrill County | Nebraska |
| Morris County (Kansas) | Kansas |
| Morris County (New Jersey) | New Jersey |
| Morris County (Texas) | Texas |
| Morrison County | Minnesota |
| Morrow County (Ohio) | Ohio |
| Morrow County (Oregon) | Oregon |
| Morton County (Kansas) | Kansas |
| Morton County (North Dakota) | North Dakota |
| Motley County | Texas |
| Moultrie County | Illinois |
| Mountrail County | North Dakota |
| Mower County | Minnesota |
| Muhlenberg County | Kentucky |
| Multnomah County | Oregon |
| Murray County (Georgia) | Georgia |
| Murray County (Minnesota) | Minnesota |
| Murray County (Oklahoma) | Oklahoma |
| Muscatine County | Iowa |
| Muscogee County | Georgia |
| Muskegon County | Michigan |
| Muskingum County | Ohio |
| Muskogee County | Oklahoma |
| Musselshell County | Montana |
| Nacogdoches County | Texas |
| Nance County | Nebraska |
| Nantucket County | Massachusetts |
| Napa County | California |
| Nash County | North Carolina |
| Nassau County (Florida) | Florida |
| Nassau County (New York) | New York |
| Natchitoches Parish | Louisiana |
| Natrona County | Wyoming |
| Navajo County | Arizona |
| Navarro County | Texas |
| Nelson County (Kentucky) | Kentucky |
| Nelson County (North Dakota) | North Dakota |
| Nelson County (Virginia) | Virginia |
| Nemaha County (Kansas) | Kansas |
| Nemaha County (Nebraska) | Nebraska |
| Neosho County | Kansas |
| Neshoba County | Mississippi |
| Ness County | Kansas |
| Nevada County (Arkansas) | Arkansas |
| Nevada County (California) | California |
| New Castle County | Delaware |
| New Hanover County | North Carolina |
| New Haven County | Connecticut |
| New Kent County | Virginia |
| New London County | Connecticut |
| New Madrid County | Missouri |
| New York County | New York |
| Newaygo County | Michigan |
| Newberry County | South Carolina |
| Newport County | Rhode Island |
| Newport News city | Virginia |
| Newton County (Arkansas) | Arkansas |
| Newton County (Georgia) | Georgia |
| Newton County (Indiana) | Indiana |
| Newton County (Mississippi) | Mississippi |
| Newton County (Missouri) | Missouri |
| Newton County (Texas) | Texas |
| Nez Perce County | Idaho |
| Niagara County | New York |
| Nicholas County (Kentucky) | Kentucky |
| Nicholas County (West Virginia) | West Virginia |
| Nicollet County | Minnesota |
| Niobrara County | Wyoming |
| Noble County (Indiana) | Indiana |
| Noble County (Ohio) | Ohio |
| Noble County (Oklahoma) | Oklahoma |
| Nobles County | Minnesota |
| Nodaway County | Missouri |
| Nolan County | Texas |
| Nome Census Area | Alaska |
| Norfolk County | Massachusetts |
| Norfolk city | Virginia |
| Norman County | Minnesota |
| North Slope Borough | Alaska |
| Northampton County (North Carolina) | North Carolina |
| Northampton County (Pennsylvania) | Pennsylvania |
| Northampton County (Virginia) | Virginia |
| Northumberland County (Pennsylvania) | Pennsylvania |
| Northumberland County (Virginia) | Virginia |
| Northwest Arctic Borough | Alaska |
| Norton County | Kansas |
| Norton city | Virginia |
| Nottoway County | Virginia |
| Nowata County | Oklahoma |
| Noxubee County | Mississippi |
| Nuckolls County | Nebraska |
| Nueces County | Texas |
| Nye County | Nevada |
| O'Brien County | Iowa |
| Oakland County | Michigan |
| Obion County | Tennessee |
| Ocean County | New Jersey |
| Oceana County | Michigan |
| Ochiltree County | Texas |
| Oconee County (Georgia) | Georgia |
| Oconee County (South Carolina) | South Carolina |
| Oconto County | Wisconsin |
| Ogemaw County | Michigan |
| Oglala Lakota County | South Dakota |
| Ogle County | Illinois |
| Oglethorpe County | Georgia |
| Ohio County (Indiana) | Indiana |
| Ohio County (Kentucky) | Kentucky |
| Ohio County (West Virginia) | West Virginia |
| Okaloosa County | Florida |
| Okanogan County | Washington |
| Okeechobee County | Florida |
| Okfuskee County | Oklahoma |
| Oklahoma County | Oklahoma |
| Okmulgee County | Oklahoma |
| Oktibbeha County | Mississippi |
| Oldham County (Kentucky) | Kentucky |
| Oldham County (Texas) | Texas |
| Oliver County | North Dakota |
| Olmsted County | Minnesota |
| Oneida County (Idaho) | Idaho |
| Oneida County (New York) | New York |
| Oneida County (Wisconsin) | Wisconsin |
| Onondaga County | New York |
| Onslow County | North Carolina |
| Ontario County | New York |
| Ontonagon County | Michigan |
| Orange County (California) | California |
| Orange County (Florida) | Florida |
| Orange County (Indiana) | Indiana |
| Orange County (New York) | New York |
| Orange County (North Carolina) | North Carolina |
| Orange County (Texas) | Texas |
| Orange County (Vermont) | Vermont |
| Orange County (Virginia) | Virginia |
| Orangeburg County | South Carolina |
| Oregon County | Missouri |
| Orleans County (New York) | New York |
| Orleans County (Vermont) | Vermont |
| Orleans Parish | Louisiana |
| Osage County (Kansas) | Kansas |
| Osage County (Missouri) | Missouri |
| Osage County (Oklahoma) | Oklahoma |
| Osborne County | Kansas |
| Osceola County (Florida) | Florida |
| Osceola County (Iowa) | Iowa |
| Osceola County (Michigan) | Michigan |
| Oscoda County | Michigan |
| Oswego County | New York |
| Otero County (Colorado) | Colorado |
| Otero County (New Mexico) | New Mexico |
| Otoe County | Nebraska |
| Otsego County (Michigan) | Michigan |
| Otsego County (New York) | New York |
| Ottawa County (Kansas) | Kansas |
| Ottawa County (Michigan) | Michigan |
| Ottawa County (Ohio) | Ohio |
| Ottawa County (Oklahoma) | Oklahoma |
| Otter Tail County | Minnesota |
| Ouachita County | Arkansas |
| Ouachita Parish | Louisiana |
| Ouray County | Colorado |
| Outagamie County | Wisconsin |
| Overton County | Tennessee |
| Owen County (Indiana) | Indiana |
| Owen County (Kentucky) | Kentucky |
| Owsley County | Kentucky |
| Owyhee County | Idaho |
| Oxford County | Maine |
| Ozark County | Missouri |
| Ozaukee County | Wisconsin |
| Pacific County | Washington |
| Page County (Iowa) | Iowa |
| Page County (Virginia) | Virginia |
| Palm Beach County | Florida |
| Palo Alto County | Iowa |
| Palo Pinto County | Texas |
| Pamlico County | North Carolina |
| Panola County (Mississippi) | Mississippi |
| Panola County (Texas) | Texas |
| Park County (Colorado) | Colorado |
| Park County (Montana) | Montana |
| Park County (Wyoming) | Wyoming |
| Parke County | Indiana |
| Parker County | Texas |
| Parmer County | Texas |
| Pasco County | Florida |
| Pasquotank County | North Carolina |
| Passaic County | New Jersey |
| Patrick County | Virginia |
| Paulding County (Georgia) | Georgia |
| Paulding County (Ohio) | Ohio |
| Pawnee County (Kansas) | Kansas |
| Pawnee County (Nebraska) | Nebraska |
| Pawnee County (Oklahoma) | Oklahoma |
| Payette County | Idaho |
| Payne County | Oklahoma |
| Peach County | Georgia |
| Pearl River County | Mississippi |
| Pecos County | Texas |
| Pembina County | North Dakota |
| Pemiscot County | Missouri |
| Pend Oreille County | Washington |
| Pender County | North Carolina |
| Pendleton County (Kentucky) | Kentucky |
| Pendleton County (West Virginia) | West Virginia |
| Pennington County (Minnesota) | Minnesota |
| Pennington County (South Dakota) | South Dakota |
| Penobscot County | Maine |
| Peoria County | Illinois |
| Pepin County | Wisconsin |
| Perkins County (Nebraska) | Nebraska |
| Perkins County (South Dakota) | South Dakota |
| Perquimans County | North Carolina |
| Perry County (Alabama) | Alabama |
| Perry County (Arkansas) | Arkansas |
| Perry County (Illinois) | Illinois |
| Perry County (Indiana) | Indiana |
| Perry County (Kentucky) | Kentucky |
| Perry County (Mississippi) | Mississippi |
| Perry County (Missouri) | Missouri |
| Perry County (Ohio) | Ohio |
| Perry County (Pennsylvania) | Pennsylvania |
| Perry County (Tennessee) | Tennessee |
| Pershing County | Nevada |
| Person County | North Carolina |
| Petersburg Borough | Alaska |
| Petersburg city | Virginia |
| Petroleum County | Montana |
| Pettis County | Missouri |
| Phelps County (Missouri) | Missouri |
| Phelps County (Nebraska) | Nebraska |
| Philadelphia County | Pennsylvania |
| Phillips County (Arkansas) | Arkansas |
| Phillips County (Colorado) | Colorado |
| Phillips County (Kansas) | Kansas |
| Phillips County (Montana) | Montana |
| Piatt County | Illinois |
| Pickaway County | Ohio |
| Pickens County (Alabama) | Alabama |
| Pickens County (Georgia) | Georgia |
| Pickens County (South Carolina) | South Carolina |
| Pickett County | Tennessee |
| Pierce County (Georgia) | Georgia |
| Pierce County (Nebraska) | Nebraska |
| Pierce County (North Dakota) | North Dakota |
| Pierce County (Washington) | Washington |
| Pierce County (Wisconsin) | Wisconsin |
| Pike County (Alabama) | Alabama |
| Pike County (Arkansas) | Arkansas |
| Pike County (Georgia) | Georgia |
| Pike County (Illinois) | Illinois |
| Pike County (Indiana) | Indiana |
| Pike County (Kentucky) | Kentucky |
| Pike County (Mississippi) | Mississippi |
| Pike County (Missouri) | Missouri |
| Pike County (Ohio) | Ohio |
| Pike County (Pennsylvania) | Pennsylvania |
| Pima County | Arizona |
| Pinal County | Arizona |
| Pine County | Minnesota |
| Pinellas County | Florida |
| Pipestone County | Minnesota |
| Piscataquis County | Maine |
| Pitkin County | Colorado |
| Pitt County | North Carolina |
| Pittsburg County | Oklahoma |
| Pittsylvania County | Virginia |
| Piute County | Utah |
| Placer County | California |
| Plaquemines Parish | Louisiana |
| Platte County (Missouri) | Missouri |
| Platte County (Nebraska) | Nebraska |
| Platte County (Wyoming) | Wyoming |
| Pleasants County | West Virginia |
| Plumas County | California |
| Plymouth County (Iowa) | Iowa |
| Plymouth County (Massachusetts) | Massachusetts |
| Pocahontas County (Iowa) | Iowa |
| Pocahontas County (West Virginia) | West Virginia |
| Poinsett County | Arkansas |
| Pointe Coupee Parish | Louisiana |
| Polk County (Arkansas) | Arkansas |
| Polk County (Florida) | Florida |
| Polk County (Georgia) | Georgia |
| Polk County (Iowa) | Iowa |
| Polk County (Minnesota) | Minnesota |
| Polk County (Missouri) | Missouri |
| Polk County (Nebraska) | Nebraska |
| Polk County (North Carolina) | North Carolina |
| Polk County (Oregon) | Oregon |
| Polk County (Tennessee) | Tennessee |
| Polk County (Texas) | Texas |
| Polk County (Wisconsin) | Wisconsin |
| Pondera County | Montana |
| Pontotoc County (Mississippi) | Mississippi |
| Pontotoc County (Oklahoma) | Oklahoma |
| Pope County (Arkansas) | Arkansas |
| Pope County (Illinois) | Illinois |
| Pope County (Minnesota) | Minnesota |
| Poquoson city | Virginia |
| Portage County (Ohio) | Ohio |
| Portage County (Wisconsin) | Wisconsin |
| Porter County | Indiana |
| Portsmouth city | Virginia |
| Posey County | Indiana |
| Pottawatomie County (Kansas) | Kansas |
| Pottawatomie County (Oklahoma) | Oklahoma |
| Pottawattamie County | Iowa |
| Potter County (Pennsylvania) | Pennsylvania |
| Potter County (South Dakota) | South Dakota |
| Potter County (Texas) | Texas |
| Powder River County | Montana |
| Powell County (Kentucky) | Kentucky |
| Powell County (Montana) | Montana |
| Power County | Idaho |
| Poweshiek County | Iowa |
| Powhatan County | Virginia |
| Prairie County (Arkansas) | Arkansas |
| Prairie County (Montana) | Montana |
| Pratt County | Kansas |
| Preble County | Ohio |
| Prentiss County | Mississippi |
| Presidio County | Texas |
| Presque Isle County | Michigan |
| Preston County | West Virginia |
| Price County | Wisconsin |
| Prince Edward County | Virginia |
| Prince George County | Virginia |
| Prince George's County | Maryland |
| Prince William County | Virginia |
| Prince of Wales-Hyder Census Area | Alaska |
| Providence County | Rhode Island |
| Prowers County | Colorado |
| Pueblo County | Colorado |
| Pulaski County (Arkansas) | Arkansas |
| Pulaski County (Georgia) | Georgia |
| Pulaski County (Illinois) | Illinois |
| Pulaski County (Indiana) | Indiana |
| Pulaski County (Kentucky) | Kentucky |
| Pulaski County (Missouri) | Missouri |
| Pulaski County (Virginia) | Virginia |
| Pushmataha County | Oklahoma |
| Putnam County (Florida) | Florida |
| Putnam County (Georgia) | Georgia |
| Putnam County (Illinois) | Illinois |
| Putnam County (Indiana) | Indiana |
| Putnam County (Missouri) | Missouri |
| Putnam County (New York) | New York |
| Putnam County (Ohio) | Ohio |
| Putnam County (Tennessee) | Tennessee |
| Putnam County (West Virginia) | West Virginia |
| Quay County | New Mexico |
| Queen Anne's County | Maryland |
| Queens County | New York |
| Quitman County (Georgia) | Georgia |
| Quitman County (Mississippi) | Mississippi |
| Rabun County | Georgia |
| Racine County | Wisconsin |
| Radford city | Virginia |
| Rains County | Texas |
| Raleigh County | West Virginia |
| Ralls County | Missouri |
| Ramsey County (Minnesota) | Minnesota |
| Ramsey County (North Dakota) | North Dakota |
| Randall County | Texas |
| Randolph County (Alabama) | Alabama |
| Randolph County (Arkansas) | Arkansas |
| Randolph County (Georgia) | Georgia |
| Randolph County (Illinois) | Illinois |
| Randolph County (Indiana) | Indiana |
| Randolph County (Missouri) | Missouri |
| Randolph County (North Carolina) | North Carolina |
| Randolph County (West Virginia) | West Virginia |
| Rankin County | Mississippi |
| Ransom County | North Dakota |
| Rapides Parish | Louisiana |
| Rappahannock County | Virginia |
| Ravalli County | Montana |
| Rawlins County | Kansas |
| Ray County | Missouri |
| Reagan County | Texas |
| Real County | Texas |
| Red Lake County | Minnesota |
| Red River County | Texas |
| Red River Parish | Louisiana |
| Red Willow County | Nebraska |
| Redwood County | Minnesota |
| Reeves County | Texas |
| Refugio County | Texas |
| Reno County | Kansas |
| Rensselaer County | New York |
| Renville County (Minnesota) | Minnesota |
| Renville County (North Dakota) | North Dakota |
| Republic County | Kansas |
| Reynolds County | Missouri |
| Rhea County | Tennessee |
| Rice County (Kansas) | Kansas |
| Rice County (Minnesota) | Minnesota |
| Rich County | Utah |
| Richardson County | Nebraska |
| Richland County (Illinois) | Illinois |
| Richland County (Montana) | Montana |
| Richland County (North Dakota) | North Dakota |
| Richland County (Ohio) | Ohio |
| Richland County (South Carolina) | South Carolina |
| Richland County (Wisconsin) | Wisconsin |
| Richland Parish | Louisiana |
| Richmond County (Georgia) | Georgia |
| Richmond County (New York) | New York |
| Richmond County (North Carolina) | North Carolina |
| Richmond County (Virginia) | Virginia |
| Richmond city | Virginia |
| Riley County | Kansas |
| Ringgold County | Iowa |
| Rio Arriba County | New Mexico |
| Rio Blanco County | Colorado |
| Rio Grande County | Colorado |
| Ripley County (Indiana) | Indiana |
| Ripley County (Missouri) | Missouri |
| Ritchie County | West Virginia |
| Riverside County | California |
| Roane County (Tennessee) | Tennessee |
| Roane County (West Virginia) | West Virginia |
| Roanoke County | Virginia |
| Roanoke city | Virginia |
| Roberts County (South Dakota) | South Dakota |
| Roberts County (Texas) | Texas |
| Robertson County (Kentucky) | Kentucky |
| Robertson County (Tennessee) | Tennessee |
| Robertson County (Texas) | Texas |
| Robeson County | North Carolina |
| Rock County (Minnesota) | Minnesota |
| Rock County (Nebraska) | Nebraska |
| Rock County (Wisconsin) | Wisconsin |
| Rock Island County | Illinois |
| Rockbridge County | Virginia |
| Rockcastle County | Kentucky |
| Rockdale County | Georgia |
| Rockingham County (New Hampshire) | New Hampshire |
| Rockingham County (North Carolina) | North Carolina |
| Rockingham County (Virginia) | Virginia |
| Rockland County | New York |
| Rockwall County | Texas |
| Roger Mills County | Oklahoma |
| Rogers County | Oklahoma |
| Rolette County | North Dakota |
| Rooks County | Kansas |
| Roosevelt County (Montana) | Montana |
| Roosevelt County (New Mexico) | New Mexico |
| Roscommon County | Michigan |
| Roseau County | Minnesota |
| Rosebud County | Montana |
| Ross County | Ohio |
| Routt County | Colorado |
| Rowan County (Kentucky) | Kentucky |
| Rowan County (North Carolina) | North Carolina |
| Runnels County | Texas |
| Rush County (Indiana) | Indiana |
| Rush County (Kansas) | Kansas |
| Rusk County (Texas) | Texas |
| Rusk County (Wisconsin) | Wisconsin |
| Russell County (Alabama) | Alabama |
| Russell County (Kansas) | Kansas |
| Russell County (Kentucky) | Kentucky |
| Russell County (Virginia) | Virginia |
| Rutherford County (North Carolina) | North Carolina |
| Rutherford County (Tennessee) | Tennessee |
| Rutland County | Vermont |
| Sabine County | Texas |
| Sabine Parish | Louisiana |
| Sac County | Iowa |
| Sacramento County | California |
| Sagadahoc County | Maine |
| Saginaw County | Michigan |
| Saguache County | Colorado |
| Salem County | New Jersey |
| Salem city | Virginia |
| Saline County (Arkansas) | Arkansas |
| Saline County (Illinois) | Illinois |
| Saline County (Kansas) | Kansas |
| Saline County (Missouri) | Missouri |
| Saline County (Nebraska) | Nebraska |
| Salt Lake County | Utah |
| Saluda County | South Carolina |
| Sampson County | North Carolina |
| San Augustine County | Texas |
| San Benito County | California |
| San Bernardino County | California |
| San Diego County | California |
| San Francisco County | California |
| San Jacinto County | Texas |
| San Joaquin County | California |
| San Juan County (Colorado) | Colorado |
| San Juan County (New Mexico) | New Mexico |
| San Juan County (Utah) | Utah |
| San Juan County (Washington) | Washington |
| San Luis Obispo County | California |
| San Mateo County | California |
| San Miguel County (Colorado) | Colorado |
| San Miguel County (New Mexico) | New Mexico |
| San Patricio County | Texas |
| San Saba County | Texas |
| Sanborn County | South Dakota |
| Sanders County | Montana |
| Sandoval County | New Mexico |
| Sandusky County | Ohio |
| Sangamon County | Illinois |
| Sanilac County | Michigan |
| Sanpete County | Utah |
| Santa Barbara County | California |
| Santa Clara County | California |
| Santa Cruz County (Arizona) | Arizona |
| Santa Cruz County (California) | California |
| Santa Fe County | New Mexico |
| Santa Rosa County | Florida |
| Sarasota County | Florida |
| Saratoga County | New York |
| Sargent County | North Dakota |
| Sarpy County | Nebraska |
| Sauk County | Wisconsin |
| Saunders County | Nebraska |
| Sawyer County | Wisconsin |
| Schenectady County | New York |
| Schleicher County | Texas |
| Schley County | Georgia |
| Schoharie County | New York |
| Schoolcraft County | Michigan |
| Schuyler County (Illinois) | Illinois |
| Schuyler County (Missouri) | Missouri |
| Schuyler County (New York) | New York |
| Schuylkill County | Pennsylvania |
| Scioto County | Ohio |
| Scotland County (Missouri) | Missouri |
| Scotland County (North Carolina) | North Carolina |
| Scott County (Arkansas) | Arkansas |
| Scott County (Illinois) | Illinois |
| Scott County (Indiana) | Indiana |
| Scott County (Iowa) | Iowa |
| Scott County (Kansas) | Kansas |
| Scott County (Kentucky) | Kentucky |
| Scott County (Minnesota) | Minnesota |
| Scott County (Mississippi) | Mississippi |
| Scott County (Missouri) | Missouri |
| Scott County (Tennessee) | Tennessee |
| Scott County (Virginia) | Virginia |
| Scotts Bluff County | Nebraska |
| Screven County | Georgia |
| Scurry County | Texas |
| Searcy County | Arkansas |
| Sebastian County | Arkansas |
| Sedgwick County (Colorado) | Colorado |
| Sedgwick County (Kansas) | Kansas |
| Seminole County (Florida) | Florida |
| Seminole County (Georgia) | Georgia |
| Seminole County (Oklahoma) | Oklahoma |
| Seneca County (New York) | New York |
| Seneca County (Ohio) | Ohio |
| Sequatchie County | Tennessee |
| Sequoyah County | Oklahoma |
| Sevier County (Arkansas) | Arkansas |
| Sevier County (Tennessee) | Tennessee |
| Sevier County (Utah) | Utah |
| Seward County (Kansas) | Kansas |
| Seward County (Nebraska) | Nebraska |
| Shackelford County | Texas |
| Shannon County | Missouri |
| Sharkey County | Mississippi |
| Sharp County | Arkansas |
| Shasta County | California |
| Shawano County | Wisconsin |
| Shawnee County | Kansas |
| Sheboygan County | Wisconsin |
| Shelby County (Alabama) | Alabama |
| Shelby County (Illinois) | Illinois |
| Shelby County (Indiana) | Indiana |
| Shelby County (Iowa) | Iowa |
| Shelby County (Kentucky) | Kentucky |
| Shelby County (Missouri) | Missouri |
| Shelby County (Ohio) | Ohio |
| Shelby County (Tennessee) | Tennessee |
| Shelby County (Texas) | Texas |
| Shenandoah County | Virginia |
| Sherburne County | Minnesota |
| Sheridan County (Kansas) | Kansas |
| Sheridan County (Montana) | Montana |
| Sheridan County (Nebraska) | Nebraska |
| Sheridan County (North Dakota) | North Dakota |
| Sheridan County (Wyoming) | Wyoming |
| Sherman County (Kansas) | Kansas |
| Sherman County (Nebraska) | Nebraska |
| Sherman County (Oregon) | Oregon |
| Sherman County (Texas) | Texas |
| Shiawassee County | Michigan |
| Shoshone County | Idaho |
| Sibley County | Minnesota |
| Sierra County (California) | California |
| Sierra County (New Mexico) | New Mexico |
| Silver Bow County | Montana |
| Simpson County (Kentucky) | Kentucky |
| Simpson County (Mississippi) | Mississippi |
| Sioux County (Iowa) | Iowa |
| Sioux County (Nebraska) | Nebraska |
| Sioux County (North Dakota) | North Dakota |
| Siskiyou County | California |
| Sitka City and Borough | Alaska |
| Skagit County | Washington |
| Skagway Municipality | Alaska |
| Skamania County | Washington |
| Slope County | North Dakota |
| Smith County (Kansas) | Kansas |
| Smith County (Mississippi) | Mississippi |
| Smith County (Tennessee) | Tennessee |
| Smith County (Texas) | Texas |
| Smyth County | Virginia |
| Snohomish County | Washington |
| Snyder County | Pennsylvania |
| Socorro County | New Mexico |
| Solano County | California |
| Somerset County (Maine) | Maine |
| Somerset County (Maryland) | Maryland |
| Somerset County (New Jersey) | New Jersey |
| Somerset County (Pennsylvania) | Pennsylvania |
| Somervell County | Texas |
| Sonoma County | California |
| Southampton County | Virginia |
| Southeast Fairbanks Census Area | Alaska |
| Spalding County | Georgia |
| Spartanburg County | South Carolina |
| Spencer County (Indiana) | Indiana |
| Spencer County (Kentucky) | Kentucky |
| Spink County | South Dakota |
| Spokane County | Washington |
| Spotsylvania County | Virginia |
| St. Bernard Parish | Louisiana |
| St. Charles County | Missouri |
| St. Charles Parish | Louisiana |
| St. Clair County (Alabama) | Alabama |
| St. Clair County (Illinois) | Illinois |
| St. Clair County (Michigan) | Michigan |
| St. Clair County (Missouri) | Missouri |
| St. Croix County | Wisconsin |
| St. Francis County | Arkansas |
| St. Francois County | Missouri |
| St. Helena Parish | Louisiana |
| St. James Parish | Louisiana |
| St. John the Baptist Parish | Louisiana |
| St. Johns County | Florida |
| St. Joseph County (Indiana) | Indiana |
| St. Joseph County (Michigan) | Michigan |
| St. Landry Parish | Louisiana |
| St. Lawrence County | New York |
| St. Louis County (Minnesota) | Minnesota |
| St. Louis County (Missouri) | Missouri |
| St. Louis city | Missouri |
| St. Lucie County | Florida |
| St. Martin Parish | Louisiana |
| St. Mary Parish | Louisiana |
| St. Mary's County | Maryland |
| St. Tammany Parish | Louisiana |
| Stafford County (Kansas) | Kansas |
| Stafford County (Virginia) | Virginia |
| Stanislaus County | California |
| Stanley County | South Dakota |
| Stanly County | North Carolina |
| Stanton County (Kansas) | Kansas |
| Stanton County (Nebraska) | Nebraska |
| Stark County (Illinois) | Illinois |
| Stark County (North Dakota) | North Dakota |
| Stark County (Ohio) | Ohio |
| Starke County | Indiana |
| Starr County | Texas |
| Staunton city | Virginia |
| Ste. Genevieve County | Missouri |
| Stearns County | Minnesota |
| Steele County (Minnesota) | Minnesota |
| Steele County (North Dakota) | North Dakota |
| Stephens County (Georgia) | Georgia |
| Stephens County (Oklahoma) | Oklahoma |
| Stephens County (Texas) | Texas |
| Stephenson County | Illinois |
| Sterling County | Texas |
| Steuben County (Indiana) | Indiana |
| Steuben County (New York) | New York |
| Stevens County (Kansas) | Kansas |
| Stevens County (Minnesota) | Minnesota |
| Stevens County (Washington) | Washington |
| Stewart County (Georgia) | Georgia |
| Stewart County (Tennessee) | Tennessee |
| Stillwater County | Montana |
| Stoddard County | Missouri |
| Stokes County | North Carolina |
| Stone County (Arkansas) | Arkansas |
| Stone County (Mississippi) | Mississippi |
| Stone County (Missouri) | Missouri |
| Stonewall County | Texas |
| Storey County | Nevada |
| Story County | Iowa |
| Strafford County | New Hampshire |
| Stutsman County | North Dakota |
| Sublette County | Wyoming |
| Suffolk County (Massachusetts) | Massachusetts |
| Suffolk County (New York) | New York |
| Suffolk city | Virginia |
| Sullivan County (Indiana) | Indiana |
| Sullivan County (Missouri) | Missouri |
| Sullivan County (New Hampshire) | New Hampshire |
| Sullivan County (New York) | New York |
| Sullivan County (Pennsylvania) | Pennsylvania |
| Sullivan County (Tennessee) | Tennessee |
| Sully County | South Dakota |
| Summers County | West Virginia |
| Summit County (Colorado) | Colorado |
| Summit County (Ohio) | Ohio |
| Summit County (Utah) | Utah |
| Sumner County (Kansas) | Kansas |
| Sumner County (Tennessee) | Tennessee |
| Sumter County (Alabama) | Alabama |
| Sumter County (Florida) | Florida |
| Sumter County (Georgia) | Georgia |
| Sumter County (South Carolina) | South Carolina |
| Sunflower County | Mississippi |
| Surry County (North Carolina) | North Carolina |
| Surry County (Virginia) | Virginia |
| Susquehanna County | Pennsylvania |
| Sussex County (Delaware) | Delaware |
| Sussex County (New Jersey) | New Jersey |
| Sussex County (Virginia) | Virginia |
| Sutter County | California |
| Sutton County | Texas |
| Suwannee County | Florida |
| Swain County | North Carolina |
| Sweet Grass County | Montana |
| Sweetwater County | Wyoming |
| Swift County | Minnesota |
| Swisher County | Texas |
| Switzerland County | Indiana |
| Talbot County (Georgia) | Georgia |
| Talbot County (Maryland) | Maryland |
| Taliaferro County | Georgia |
| Talladega County | Alabama |
| Tallahatchie County | Mississippi |
| Tallapoosa County | Alabama |
| Tama County | Iowa |
| Taney County | Missouri |
| Tangipahoa Parish | Louisiana |
| Taos County | New Mexico |
| Tarrant County | Texas |
| Tate County | Mississippi |
| Tattnall County | Georgia |
| Taylor County (Florida) | Florida |
| Taylor County (Georgia) | Georgia |
| Taylor County (Iowa) | Iowa |
| Taylor County (Kentucky) | Kentucky |
| Taylor County (Texas) | Texas |
| Taylor County (West Virginia) | West Virginia |
| Taylor County (Wisconsin) | Wisconsin |
| Tazewell County (Illinois) | Illinois |
| Tazewell County (Virginia) | Virginia |
| Tehama County | California |
| Telfair County | Georgia |
| Teller County | Colorado |
| Tensas Parish | Louisiana |
| Terrebonne Parish | Louisiana |
| Terrell County (Georgia) | Georgia |
| Terrell County (Texas) | Texas |
| Terry County | Texas |
| Teton County (Idaho) | Idaho |
| Teton County (Montana) | Montana |
| Teton County (Wyoming) | Wyoming |
| Texas County (Missouri) | Missouri |
| Texas County (Oklahoma) | Oklahoma |
| Thayer County | Nebraska |
| Thomas County (Georgia) | Georgia |
| Thomas County (Kansas) | Kansas |
| Thomas County (Nebraska) | Nebraska |
| Throckmorton County | Texas |
| Thurston County (Nebraska) | Nebraska |
| Thurston County (Washington) | Washington |
| Tift County | Georgia |
| Tillamook County | Oregon |
| Tillman County | Oklahoma |
| Tioga County (New York) | New York |
| Tioga County (Pennsylvania) | Pennsylvania |
| Tippah County | Mississippi |
| Tippecanoe County | Indiana |
| Tipton County (Indiana) | Indiana |
| Tipton County (Tennessee) | Tennessee |
| Tishomingo County | Mississippi |
| Titus County | Texas |
| Todd County (Kentucky) | Kentucky |
| Todd County (Minnesota) | Minnesota |
| Todd County (South Dakota) | South Dakota |
| Tolland County | Connecticut |
| Tom Green County | Texas |
| Tompkins County | New York |
| Tooele County | Utah |
| Toole County | Montana |
| Toombs County | Georgia |
| Torrance County | New Mexico |
| Towner County | North Dakota |
| Towns County | Georgia |
| Traill County | North Dakota |
| Transylvania County | North Carolina |
| Traverse County | Minnesota |
| Travis County | Texas |
| Treasure County | Montana |
| Trego County | Kansas |
| Trempealeau County | Wisconsin |
| Treutlen County | Georgia |
| Trigg County | Kentucky |
| Trimble County | Kentucky |
| Trinity County (California) | California |
| Trinity County (Texas) | Texas |
| Tripp County | South Dakota |
| Troup County | Georgia |
| Trousdale County | Tennessee |
| Trumbull County | Ohio |
| Tucker County | West Virginia |
| Tulare County | California |
| Tulsa County | Oklahoma |
| Tunica County | Mississippi |
| Tuolumne County | California |
| Turner County (Georgia) | Georgia |
| Turner County (South Dakota) | South Dakota |
| Tuscaloosa County | Alabama |
| Tuscarawas County | Ohio |
| Tuscola County | Michigan |
| Twiggs County | Georgia |
| Twin Falls County | Idaho |
| Tyler County (Texas) | Texas |
| Tyler County (West Virginia) | West Virginia |
| Tyrrell County | North Carolina |
| Uinta County | Wyoming |
| Uintah County | Utah |
| Ulster County | New York |
| Umatilla County | Oregon |
| Unicoi County | Tennessee |
| Union County (Arkansas) | Arkansas |
| Union County (Florida) | Florida |
| Union County (Georgia) | Georgia |
| Union County (Illinois) | Illinois |
| Union County (Indiana) | Indiana |
| Union County (Iowa) | Iowa |
| Union County (Kentucky) | Kentucky |
| Union County (Mississippi) | Mississippi |
| Union County (New Jersey) | New Jersey |
| Union County (New Mexico) | New Mexico |
| Union County (North Carolina) | North Carolina |
| Union County (Ohio) | Ohio |
| Union County (Oregon) | Oregon |
| Union County (Pennsylvania) | Pennsylvania |
| Union County (South Carolina) | South Carolina |
| Union County (South Dakota) | South Dakota |
| Union County (Tennessee) | Tennessee |
| Union Parish | Louisiana |
| Upshur County (Texas) | Texas |
| Upshur County (West Virginia) | West Virginia |
| Upson County | Georgia |
| Upton County | Texas |
| Utah County | Utah |
| Uvalde County | Texas |
| Val Verde County | Texas |
| Valencia County | New Mexico |
| Valley County (Idaho) | Idaho |
| Valley County (Montana) | Montana |
| Valley County (Nebraska) | Nebraska |
| Van Buren County (Arkansas) | Arkansas |
| Van Buren County (Iowa) | Iowa |
| Van Buren County (Michigan) | Michigan |
| Van Buren County (Tennessee) | Tennessee |
| Van Wert County | Ohio |
| Van Zandt County | Texas |
| Vance County | North Carolina |
| Vanderburgh County | Indiana |
| Venango County | Pennsylvania |
| Ventura County | California |
| Vermilion County | Illinois |
| Vermilion Parish | Louisiana |
| Vermillion County | Indiana |
| Vernon County (Missouri) | Missouri |
| Vernon County (Wisconsin) | Wisconsin |
| Vernon Parish | Louisiana |
| Victoria County | Texas |
| Vigo County | Indiana |
| Vilas County | Wisconsin |
| Vinton County | Ohio |
| Virginia Beach city | Virginia |
| Volusia County | Florida |
| Wabash County (Illinois) | Illinois |
| Wabash County (Indiana) | Indiana |
| Wabasha County | Minnesota |
| Wabaunsee County | Kansas |
| Wadena County | Minnesota |
| Wagoner County | Oklahoma |
| Wahkiakum County | Washington |
| Wake County | North Carolina |
| Wakulla County | Florida |
| Waldo County | Maine |
| Walker County (Alabama) | Alabama |
| Walker County (Georgia) | Georgia |
| Walker County (Texas) | Texas |
| Walla Walla County | Washington |
| Wallace County | Kansas |
| Waller County | Texas |
| Wallowa County | Oregon |
| Walsh County | North Dakota |
| Walthall County | Mississippi |
| Walton County (Florida) | Florida |
| Walton County (Georgia) | Georgia |
| Walworth County (South Dakota) | South Dakota |
| Walworth County (Wisconsin) | Wisconsin |
| Wapello County | Iowa |
| Ward County (North Dakota) | North Dakota |
| Ward County (Texas) | Texas |
| Ware County | Georgia |
| Warren County (Georgia) | Georgia |
| Warren County (Illinois) | Illinois |
| Warren County (Indiana) | Indiana |
| Warren County (Iowa) | Iowa |
| Warren County (Kentucky) | Kentucky |
| Warren County (Mississippi) | Mississippi |
| Warren County (Missouri) | Missouri |
| Warren County (New Jersey) | New Jersey |
| Warren County (New York) | New York |
| Warren County (North Carolina) | North Carolina |
| Warren County (Ohio) | Ohio |
| Warren County (Pennsylvania) | Pennsylvania |
| Warren County (Tennessee) | Tennessee |
| Warren County (Virginia) | Virginia |
| Warrick County | Indiana |
| Wasatch County | Utah |
| Wasco County | Oregon |
| Waseca County | Minnesota |
| Washakie County | Wyoming |
| Washburn County | Wisconsin |
| Washington County (Alabama) | Alabama |
| Washington County (Arkansas) | Arkansas |
| Washington County (Colorado) | Colorado |
| Washington County (Florida) | Florida |
| Washington County (Georgia) | Georgia |
| Washington County (Idaho) | Idaho |
| Washington County (Illinois) | Illinois |
| Washington County (Indiana) | Indiana |
| Washington County (Iowa) | Iowa |
| Washington County (Kansas) | Kansas |
| Washington County (Kentucky) | Kentucky |
| Washington County (Maine) | Maine |
| Washington County (Maryland) | Maryland |
| Washington County (Minnesota) | Minnesota |
| Washington County (Mississippi) | Mississippi |
| Washington County (Missouri) | Missouri |
| Washington County (Nebraska) | Nebraska |
| Washington County (New York) | New York |
| Washington County (North Carolina) | North Carolina |
| Washington County (Ohio) | Ohio |
| Washington County (Oklahoma) | Oklahoma |
| Washington County (Oregon) | Oregon |
| Washington County (Pennsylvania) | Pennsylvania |
| Washington County (Rhode Island) | Rhode Island |
| Washington County (Tennessee) | Tennessee |
| Washington County (Texas) | Texas |
| Washington County (Utah) | Utah |
| Washington County (Vermont) | Vermont |
| Washington County (Virginia) | Virginia |
| Washington County (Wisconsin) | Wisconsin |
| Washington Parish | Louisiana |
| Washita County | Oklahoma |
| Washoe County | Nevada |
| Washtenaw County | Michigan |
| Watauga County | North Carolina |
| Watonwan County | Minnesota |
| Waukesha County | Wisconsin |
| Waupaca County | Wisconsin |
| Waushara County | Wisconsin |
| Wayne County (Georgia) | Georgia |
| Wayne County (Illinois) | Illinois |
| Wayne County (Indiana) | Indiana |
| Wayne County (Iowa) | Iowa |
| Wayne County (Kentucky) | Kentucky |
| Wayne County (Michigan) | Michigan |
| Wayne County (Mississippi) | Mississippi |
| Wayne County (Missouri) | Missouri |
| Wayne County (Nebraska) | Nebraska |
| Wayne County (New York) | New York |
| Wayne County (North Carolina) | North Carolina |
| Wayne County (Ohio) | Ohio |
| Wayne County (Pennsylvania) | Pennsylvania |
| Wayne County (Tennessee) | Tennessee |
| Wayne County (Utah) | Utah |
| Wayne County (West Virginia) | West Virginia |
| Waynesboro city | Virginia |
| Weakley County | Tennessee |
| Webb County | Texas |
| Weber County | Utah |
| Webster County (Georgia) | Georgia |
| Webster County (Iowa) | Iowa |
| Webster County (Kentucky) | Kentucky |
| Webster County (Mississippi) | Mississippi |
| Webster County (Missouri) | Missouri |
| Webster County (Nebraska) | Nebraska |
| Webster County (West Virginia) | West Virginia |
| Webster Parish | Louisiana |
| Weld County | Colorado |
| Wells County (Indiana) | Indiana |
| Wells County (North Dakota) | North Dakota |
| West Baton Rouge Parish | Louisiana |
| West Carroll Parish | Louisiana |
| West Feliciana Parish | Louisiana |
| Westchester County | New York |
| Westmoreland County (Pennsylvania) | Pennsylvania |
| Westmoreland County (Virginia) | Virginia |
| Weston County | Wyoming |
| Wetzel County | West Virginia |
| Wexford County | Michigan |
| Wharton County | Texas |
| Whatcom County | Washington |
| Wheatland County | Montana |
| Wheeler County (Georgia) | Georgia |
| Wheeler County (Nebraska) | Nebraska |
| Wheeler County (Oregon) | Oregon |
| Wheeler County (Texas) | Texas |
| White County (Arkansas) | Arkansas |
| White County (Georgia) | Georgia |
| White County (Illinois) | Illinois |
| White County (Indiana) | Indiana |
| White County (Tennessee) | Tennessee |
| White Pine County | Nevada |
| Whiteside County | Illinois |
| Whitfield County | Georgia |
| Whitley County (Indiana) | Indiana |
| Whitley County (Kentucky) | Kentucky |
| Whitman County | Washington |
| Wibaux County | Montana |
| Wichita County (Kansas) | Kansas |
| Wichita County (Texas) | Texas |
| Wicomico County | Maryland |
| Wilbarger County | Texas |
| Wilcox County (Alabama) | Alabama |
| Wilcox County (Georgia) | Georgia |
| Wilkes County (Georgia) | Georgia |
| Wilkes County (North Carolina) | North Carolina |
| Wilkin County | Minnesota |
| Wilkinson County (Georgia) | Georgia |
| Wilkinson County (Mississippi) | Mississippi |
| Will County | Illinois |
| Willacy County | Texas |
| Williams County (North Dakota) | North Dakota |
| Williams County (Ohio) | Ohio |
| Williamsburg County | South Carolina |
| Williamsburg city | Virginia |
| Williamson County (Illinois) | Illinois |
| Williamson County (Tennessee) | Tennessee |
| Williamson County (Texas) | Texas |
| Wilson County (Kansas) | Kansas |
| Wilson County (North Carolina) | North Carolina |
| Wilson County (Tennessee) | Tennessee |
| Wilson County (Texas) | Texas |
| Winchester city | Virginia |
| Windham County (Connecticut) | Connecticut |
| Windham County (Vermont) | Vermont |
| Windsor County | Vermont |
| Winkler County | Texas |
| Winn Parish | Louisiana |
| Winnebago County (Illinois) | Illinois |
| Winnebago County (Iowa) | Iowa |
| Winnebago County (Wisconsin) | Wisconsin |
| Winneshiek County | Iowa |
| Winona County | Minnesota |
| Winston County (Alabama) | Alabama |
| Winston County (Mississippi) | Mississippi |
| Wirt County | West Virginia |
| Wise County (Texas) | Texas |
| Wise County (Virginia) | Virginia |
| Wolfe County | Kentucky |
| Wood County (Ohio) | Ohio |
| Wood County (Texas) | Texas |
| Wood County (West Virginia) | West Virginia |
| Wood County (Wisconsin) | Wisconsin |
| Woodbury County | Iowa |
| Woodford County (Illinois) | Illinois |
| Woodford County (Kentucky) | Kentucky |
| Woodruff County | Arkansas |
| Woods County | Oklahoma |
| Woodson County | Kansas |
| Woodward County | Oklahoma |
| Worcester County (Maryland) | Maryland |
| Worcester County (Massachusetts) | Massachusetts |
| Worth County (Georgia) | Georgia |
| Worth County (Iowa) | Iowa |
| Worth County (Missouri) | Missouri |
| Wrangell City and Borough | Alaska |
| Wright County (Iowa) | Iowa |
| Wright County (Minnesota) | Minnesota |
| Wright County (Missouri) | Missouri |
| Wyandot County | Ohio |
| Wyandotte County | Kansas |
| Wyoming County (New York) | New York |
| Wyoming County (Pennsylvania) | Pennsylvania |
| Wyoming County (West Virginia) | West Virginia |
| Wythe County | Virginia |
| Yadkin County | North Carolina |
| Yakima County | Washington |
| Yakutat City and Borough | Alaska |
| Yalobusha County | Mississippi |
| Yamhill County | Oregon |
| Yancey County | North Carolina |
| Yankton County | South Dakota |
| Yates County | New York |
| Yavapai County | Arizona |
| Yazoo County | Mississippi |
| Yell County | Arkansas |
| Yellow Medicine County | Minnesota |
| Yellowstone County | Montana |
| Yoakum County | Texas |
| Yolo County | California |
| York County (Maine) | Maine |
| York County (Nebraska) | Nebraska |
| York County (Pennsylvania) | Pennsylvania |
| York County (South Carolina) | South Carolina |
| York County (Virginia) | Virginia |
| Young County | Texas |
| Yuba County | California |
| Yukon-Koyukuk Census Area | Alaska |
| Yuma County (Arizona) | Arizona |
| Yuma County (Colorado) | Colorado |
| Zapata County | Texas |
| Zavala County | Texas |
| Ziebach County | South Dakota |