Index of U.S. counties

A

 * Abbeville County, South Carolina
 * Acadia Parish, Louisiana
 * Accomack County, Virginia
 * Ada County, Idaho
 * Adair County: Iowa; Kentucky; Missouri; Oklahoma
 * Adams County: Colorado; Idaho; Illinois; Indiana; Iowa; Mississippi; Nebraska; North Dakota; Ohio; Pennsylvania; Washington; Wisconsin
 * Addison County, Vermont
 * Adjuntas Municipality, Puerto Rico
 * Aguada Municipality, Puerto Rico
 * Aguadilla Municipality, Puerto Rico
 * Aguas Buenas Municipality, Puerto Rico
 * Aibonito Municipality, Puerto Rico
 * Aiken County, South Carolina
 * Aitkin County, Minnesota
 * Alachua County, Florida
 * Alamance County, North Carolina
 * Alameda County, California
 * Alamosa County, Colorado
 * Albany County: New York; Wyoming
 * Albemarle County, Virginia
 * Alcona County, Michigan
 * Alcorn County, Mississippi
 * Aleutians East Borough, Alaska
 * Aleutians West Census Area, Alaska
 * Alexander County: Illinois; North Carolina
 * Alfalfa County, Oklahoma
 * Alger County, Michigan
 * Allamakee County, Iowa
 * Allegan County, Michigan
 * Allegany County: Maryland; New York
 * Alleghany County: North Carolina; Virginia
 * Allegheny County, Pennsylvania
 * Allen County: Indiana; Kansas; Kentucky; 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
 * Añasco Municipality, Puerto Rico
 * Municipality of Anchorage, Alaska (a consolidated city-borough under Alaska law)
 * Anderson County: Kansas; Kentucky; South Carolina; Tennessee; 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
 * Arecibo Municipality, Puerto Rico
 * Arenac County, Michigan
 * Arkansas County, Arkansas
 * Arlington County, Virginia
 * Armstrong County: Pennsylvania; Texas
 * Aroostook County, Maine
 * Arroyo Municipality, Puerto Rico
 * Arthur County, Nebraska
 * Ascension Parish, Louisiana
 * Ashe County, North Carolina
 * Ashland County: Ohio; Wisconsin
 * Ashley County, Arkansas
 * Ashtabula County, Ohio
 * Asotin County, Washington
 * Assumption Parish, Louisiana
 * Atascosa County, Texas
 * Atchison County: Kansas; 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

B

 * Baca County, Colorado
 * Bacon County, Georgia
 * Bailey County, Texas
 * Baker County: Florida; Georgia; Oregon
 * Baker Island, U.S. Minor Outlying Islands
 * Baldwin County: Alabama; Georgia
 * Ballard County, Kentucky
 * Baltimore County, 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; West Virginia
 * Barceloneta Municipality, Puerto Rico
 * Barnes County, North Dakota
 * Barnstable County, Massachusetts
 * Barnwell County, South Carolina
 * Barranquitas Municipality, Puerto Rico
 * Barren County, Kentucky
 * Barron County, Wisconsin
 * Barrow County, Georgia
 * Barry County: Michigan; Missouri
 * Bartholomew County, Indiana
 * Barton County: Kansas; Missouri
 * Bartow County, Georgia
 * Bastrop County, Texas
 * Bates County, Missouri
 * Bath County: Kentucky; Virginia
 * Baxter County, Arkansas
 * Bay County: Florida; Michigan
 * Bayamón Municipality, Puerto Rico
 * Bayfield County, Wisconsin
 * Baylor County, Texas
 * Beadle County, South Dakota
 * Bear Lake County, Idaho
 * Beaufort County: North Carolina; South Carolina
 * Beauregard Parish, Louisiana
 * Beaver County: Oklahoma; Pennsylvania; Utah
 * Beaverhead County, Montana
 * Becker County, Minnesota
 * Beckham County, Oklahoma
 * Bedford County: Pennsylvania; Tennessee; Virginia
 * Bee County, Texas
 * Belknap County, New Hampshire
 * Bell County: Kentucky; 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; Indiana; Iowa; Minnesota; Mississippi; Missouri; Oregon; Tennessee; Washington
 * Benzie County, Michigan
 * Bergen County, New Jersey
 * Berkeley County: South Carolina; West Virginia
 * Berks County, Pennsylvania
 * Berkshire County, Massachusetts
 * Bernalillo County, New Mexico
 * Berrien County: Georgia; Michigan
 * Bertie County, North Carolina
 * Bethel Census Area, Alaska
 * Bexar County, Texas
 * Bibb County: Alabama; Georgia
 * Bienville Parish, Louisiana
 * Big Horn County: Montana; 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; Montana; Nebraska; Oklahoma
 * Blair County, Pennsylvania
 * Blanco County, Texas
 * Bland County, Virginia
 * Bleckley County, Georgia
 * Bledsoe County, Tennessee
 * Blount County: Alabama; 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; Illinois; Indiana; Iowa; Kentucky; Missouri; Nebraska; 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; Kentucky
 * Bowie County, Texas
 * Bowman County, North Dakota
 * Box Butte County, Nebraska
 * Box Elder County, Utah
 * Boyd County: Kentucky; Nebraska
 * Boyle County, Kentucky
 * Bracken County, Kentucky
 * Bradford County: Florida; Pennsylvania
 * Bradley County: Arkansas; 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; Rhode Island
 * Broadwater County, Montana
 * Bronx County, New York
 * Brooke County, West Virginia
 * Brookings County, South Dakota
 * Brooks County: Georgia; Texas
 * Broome County, New York
 * City and County of Broomfield, Colorado
 * Broward County, Florida
 * Brown County: Illinois; Indiana; Kansas; Minnesota; Nebraska; Ohio; South Dakota; Texas; Wisconsin
 * Brule County, South Dakota
 * Brunswick County: North Carolina; Virginia
 * Bryan County: Georgia; Oklahoma
 * Buchanan County: Iowa; Missouri; Virginia
 * Buckingham County, Virginia
 * Bucks County, Pennsylvania
 * Buena Vista County, Iowa
 * Buffalo County: Nebraska; South Dakota; Wisconsin
 * Bullitt County, Kentucky
 * Bulloch County, Georgia
 * Bullock County, Alabama
 * Buncombe County, North Carolina
 * Bureau County, Illinois
 * Burke County: Georgia; North Carolina; 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; Iowa; Kansas; Kentucky; Missouri; Nebraska; Ohio; Pennsylvania
 * Butte County: California; Idaho; South Dakota
 * Butts County, Georgia

C

 * Cabarrus County, North Carolina
 * Cabell County, West Virginia
 * Cabo Rojo Municipality, Puerto Rico
 * Cache County, Utah
 * Caddo County, Oklahoma
 * Caddo Parish, Louisiana
 * Caguas Municipality, Puerto Rico
 * Calaveras County, California
 * Calcasieu Parish, Louisiana
 * Caldwell County: Kentucky; Missouri; North Carolina; Texas
 * Caldwell Parish, Louisiana
 * Caledonia County, Vermont
 * Calhoun County: Alabama; Arkansas; Florida; Georgia; Illinois; Iowa; Michigan; Mississippi; South Carolina; Texas; 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; Missouri; New Jersey; North Carolina
 * Cameron County: Pennsylvania; Texas
 * Cameron Parish, Louisiana
 * Camp County, Texas
 * Campbell County: Kentucky; South Dakota; Tennessee; Virginia; Wyoming
 * Camuy Municipality, Puerto Rico
 * Canadian County, Oklahoma
 * Candler County, Georgia
 * Cannon County, Tennessee
 * Canóvanas Municipality, Puerto Rico
 * Canyon County, Idaho
 * Cape Girardeau County, Missouri
 * Cape May County, New Jersey
 * Carbon County: Montana; Pennsylvania; Utah; Wyoming
 * Caribou County, Idaho
 * Carlisle County, Kentucky
 * Carlton County, Minnesota
 * Carolina Municipality, Puerto Rico
 * Caroline County: Maryland; Virginia
 * Carroll County: Arkansas; Georgia; Illinois; Indiana; Iowa; Kentucky; Maryland; Mississippi; Missouri; New Hampshire; Ohio; Tennessee; Virginia
 * Carson County, Texas
 * Carter County: Kentucky; Missouri; Montana; Oklahoma; Tennessee
 * Carteret County, North Carolina
 * Carver County, Minnesota
 * Cascade County, Montana
 * Casey County, Kentucky
 * Cass County: Illinois; Indiana; Iowa; Michigan; Minnesota; Missouri; Nebraska; North Dakota; Texas
 * Cassia County, Idaho
 * Castro County, Texas
 * Caswell County, North Carolina
 * Catahoula Parish, Louisiana
 * Cataño Municipality, Puerto Rico
 * Catawba County, North Carolina
 * Catoosa County, Georgia
 * Catron County, New Mexico
 * Cattaraugus County, New York
 * Cavalier County, North Dakota
 * Cayey Municipality, Puerto Rico
 * Cayuga County, New York
 * Cecil County, Maryland
 * Cedar County: Iowa; Missouri; Nebraska
 * Ceiba Municipality, Puerto Rico
 * Centre County, Pennsylvania
 * Cerro Gordo County, Iowa
 * Chaffee County, Colorado
 * Chambers County: Alabama; Texas
 * Champaign County: Illinois; 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; Virginia
 * Charlton County, Georgia
 * Chase County: Kansas; Nebraska
 * Chatham County: Georgia; North Carolina
 * Chattahoochee County, Georgia
 * Chattooga County, Georgia
 * Chautauqua County: Kansas; 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; Georgia; Iowa; Kansas; North Carolina; Oklahoma; South Carolina; Texas
 * Cherry County, Nebraska
 * Cheshire County, New Hampshire
 * Chester County: Pennsylvania; South Carolina; Tennessee
 * Chesterfield County: South Carolina; Virginia
 * Cheyenne County: Colorado; Kansas; Nebraska
 * Chickasaw County: Iowa; Mississippi
 * Chicot County, Arkansas
 * Childress County, Texas
 * Chilton County, Alabama
 * Chippewa County: Michigan; Minnesota; Wisconsin
 * Chisago County, Minnesota
 * Chittenden County, Vermont
 * Choctaw County: Alabama; Mississippi; Oklahoma
 * Chouteau County, Montana
 * Chowan County, North Carolina
 * Christian County: Illinois; Kentucky; Missouri
 * Chugach Census Area, Alaska
 * Churchill County, Nevada
 * Ciales Municipality, Puerto Rico
 * Cibola County, New Mexico
 * Cidra Municipality, Puerto Rico
 * Cimarron County, Oklahoma
 * Citrus County, Florida
 * Clackamas County, Oregon
 * Claiborne County: Mississippi; Tennessee
 * Claiborne Parish, Louisiana
 * Clallam County, Washington
 * Clare County, Michigan
 * Clarendon County, South Carolina
 * Clarion County, Pennsylvania
 * Clark County: Arkansas; Idaho; Illinois; Indiana; Kansas; Kentucky; Missouri; Nevada; Ohio; South Dakota; Washington; Wisconsin
 * Clarke County: Alabama; Georgia; Iowa; Mississippi; Virginia
 * Clatsop County, Oregon
 * Clay County: Alabama; Arkansas; Florida; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Minnesota; Mississippi; Missouri; Nebraska; North Carolina; South Dakota; Tennessee; Texas; West Virginia
 * Clayton County: Georgia; Iowa
 * Clear Creek County, Colorado
 * Clearfield County, Pennsylvania
 * Clearwater County: Idaho; Minnesota
 * Cleburne County: Alabama; Arkansas
 * Clermont County, Ohio
 * Cleveland County: Arkansas; North Carolina; Oklahoma
 * Clinch County, Georgia
 * Clinton County: Illinois; Indiana; Iowa; Kentucky; Michigan; Missouri; New York; Ohio; Pennsylvania
 * Cloud County, Kansas
 * Coahoma County, Mississippi
 * Coal County, Oklahoma
 * Coamo Municipality, Puerto Rico
 * Cobb County, Georgia
 * Cochise County, Arizona
 * Cochran County, Texas
 * Cocke County, Tennessee
 * Coconino County, Arizona
 * Codington County, South Dakota
 * Coffee County: Alabama; Georgia; Tennessee
 * Coffey County, Kansas
 * Coke County, Texas
 * Colbert County, Alabama
 * Cole County, Missouri
 * Coleman County, Texas
 * Coles County, Illinois
 * Colfax County: Nebraska; New Mexico
 * Colleton County, South Carolina
 * Collier County, Florida
 * Collin County, Texas
 * Collingsworth County, Texas
 * Colorado County, Texas
 * Colquitt County, Georgia
 * Columbia County: Arkansas; Florida; Georgia; New York; Oregon; Pennsylvania; Washington; Wisconsin
 * Columbiana County, Ohio
 * Columbus County, North Carolina
 * Colusa County, California
 * Comal County, Texas
 * Comanche County: Kansas; Oklahoma; Texas
 * Comerío Municipality, Puerto Rico
 * 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; Illinois; Minnesota
 * Cooke County, Texas
 * Cooper County, Missouri
 * Coos County, Oregon
 * Coös County, New Hampshire
 * Coosa County, Alabama
 * Copiah County, Mississippi
 * Copper River Census Area, Alaska
 * Corozal Municipality, Puerto Rico
 * 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; Mississippi
 * Coweta County, Georgia
 * Cowley County, Kansas
 * Cowlitz County, Washington
 * Craig County: Oklahoma; Virginia
 * Craighead County, Arkansas
 * Crane County, Texas
 * Craven County, North Carolina
 * Crawford County: Arkansas; Georgia; Illinois; Indiana; Iowa; Kansas; Michigan; Missouri; Ohio; Pennsylvania; Wisconsin
 * Creek County, Oklahoma
 * Crenshaw County, Alabama
 * Crisp County, Georgia
 * Crittenden County: Arkansas; Kentucky
 * Crockett County: Tennessee; Texas
 * Crook County: Oregon; Wyoming
 * Crosby County, Texas
 * Cross County, Arkansas
 * Crow Wing County, Minnesota
 * Crowley County, Colorado
 * Culberson County, Texas
 * Culebra Municipality, Puerto Rico
 * Cullman County, Alabama
 * Culpeper County, Virginia
 * Cumberland County: Illinois; Kentucky; Maine; New Jersey; North Carolina; Pennsylvania; Tennessee; Virginia
 * Cuming County, Nebraska
 * Currituck County, North Carolina
 * Curry County: New Mexico; Oregon
 * Custer County: Colorado; Idaho; Montana; Nebraska; Oklahoma; South Dakota
 * Cuyahoga County, Ohio

D

 * Dade County: Georgia; Missouri; (Florida)
 * Daggett County, Utah
 * Dakota County: Minnesota; Nebraska
 * Dale County, Alabama
 * Dallam County, Texas
 * Dallas County: Alabama; Arkansas; Iowa; Missouri; Texas
 * Dane County, Wisconsin
 * Daniels County, Montana
 * Dare County, North Carolina
 * Darke County, Ohio
 * Darlington County, South Carolina
 * Dauphin County, Pennsylvania
 * Davidson County: North Carolina; Tennessee
 * Davie County, North Carolina
 * Daviess County: Indiana; Kentucky; Missouri
 * Davis County: Iowa; Utah
 * Davison County, South Dakota
 * Dawes County, Nebraska
 * Dawson County: Georgia; Montana; Nebraska; Texas
 * Day County, South Dakota
 * De Baca County, New Mexico
 * DeKalb County: Alabama; Georgia; Illinois; Indiana; Missouri; Tennessee
 * De Soto Parish, Louisiana
 * DeSoto County: Florida; Mississippi
 * De Witt County, Illinois
 * DeWitt County, Texas
 * Deaf Smith County, Texas
 * Dearborn County, Indiana
 * Decatur County: Georgia; Indiana; Iowa; Kansas; Tennessee
 * Deer Lodge County, Montana
 * Defiance County, Ohio
 * Del Norte County, California
 * Delaware County: Indiana; Iowa; New York; Ohio; Oklahoma; Pennsylvania
 * Delta County: Colorado; Michigan; Texas
 * Denali Borough, Alaska
 * Dent County, Missouri
 * Denton County, Texas
 * City and County of Denver, Colorado
 * Des Moines County, Iowa
 * Deschutes County, Oregon
 * Desha County, Arkansas
 * Deuel County: Nebraska; South Dakota
 * Dewey County: Oklahoma; South Dakota
 * Dickens County, Texas
 * Dickenson County, Virginia
 * Dickey County, North Dakota
 * Dickinson County: Iowa; Kansas; Michigan
 * Dickson County, Tennessee
 * Dillingham Census Area, Alaska
 * Dillon County, South Carolina
 * Dimmit County, Texas
 * Dinwiddie County, Virginia
 * District of Columbia
 * Divide County, North Dakota
 * Dixie County, Florida
 * Dixon County, Nebraska
 * Doddridge County, West Virginia
 * Dodge County: Georgia; Minnesota; Nebraska; Wisconsin
 * Dolores County, Colorado
 * Doña Ana County, New Mexico
 * Doniphan County, Kansas
 * Donley County, Texas
 * Dooly County, Georgia
 * Door County, Wisconsin
 * Dorado Municipality, Puerto Rico
 * Dorchester County: Maryland; South Carolina
 * Dougherty County, Georgia
 * Douglas County: Colorado; Georgia; Illinois; Kansas; Minnesota; Missouri; Nebraska; Nevada; Oregon; South Dakota; Washington; Wisconsin
 * 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; Wisconsin
 * Duplin County, North Carolina
 * Durham County, North Carolina
 * Dutchess County, New York
 * Duval County: Florida; Texas
 * Dyer County, Tennessee

E

 * Eagle County, Colorado
 * Early County, Georgia
 * East Baton Rouge Parish, Louisiana
 * East Carroll Parish, Louisiana
 * East Feliciana Parish, Louisiana
 * Eastern District, American Samoa
 * Eastland County, Texas
 * Eaton County, Michigan
 * Eau Claire County, Wisconsin
 * Echols County, Georgia
 * Ector County, Texas
 * Eddy County: New Mexico; North Dakota
 * Edgar County, Illinois
 * Edgecombe County, North Carolina
 * Edgefield County, South Carolina
 * Edmonson County, Kentucky
 * Edmunds County, South Dakota
 * Edwards County: Illinois; Kansas; Texas
 * Effingham County: Georgia; Illinois
 * El Dorado County, California
 * El Paso County: Colorado; Texas
 * Elbert County: Colorado; Georgia
 * Elk County: Kansas; Pennsylvania
 * Elkhart County, Indiana
 * Elko County, Nevada
 * Elliott County, Kentucky
 * Ellis County: Kansas; Oklahoma; Texas
 * Ellsworth County, Kansas
 * Elmore County: Alabama; Idaho
 * Emanuel County, Georgia
 * Emery County, Utah
 * Emmet County: Iowa; Michigan
 * Emmons County, North Dakota
 * Erath County, Texas
 * Erie County: New York; Ohio; Pennsylvania
 * Escambia County: Alabama; Florida
 * Esmeralda County, Nevada
 * Essex County: Massachusetts; New Jersey; New York; Vermont; Virginia
 * Estill County, Kentucky
 * Etowah County, Alabama
 * Eureka County, Nevada
 * Evangeline Parish, Louisiana
 * Evans County, Georgia

F

 * Fairbanks North Star Borough, Alaska
 * Fairfax County, Virginia
 * Fairfield County: Connecticut; Ohio; South Carolina
 * Fajardo Municipality, Puerto Rico
 * Fall River County, South Dakota
 * Fallon County, Montana
 * Falls County, Texas
 * Fannin County: Georgia; Texas
 * Faribault County, Minnesota
 * Faulk County, South Dakota
 * Faulkner County, Arkansas
 * Fauquier County, Virginia
 * Fayette County: Alabama; Georgia; Illinois; Indiana; Iowa; Kentucky; Ohio; Pennsylvania; Tennessee; Texas; West Virginia
 * Fentress County, Tennessee
 * Fergus County, Montana
 * Ferry County, Washington
 * Fillmore County: Minnesota; Nebraska
 * Finney County, Kansas
 * Fisher County, Texas
 * Flagler County, Florida
 * Flathead County, Montana
 * Fleming County, Kentucky
 * Florence County: South Carolina; Wisconsin
 * Florida Municipality, Puerto Rico
 * Floyd County: Georgia; Indiana; Iowa; Kentucky; Texas; Virginia
 * Fluvanna County, Virginia
 * Foard County, Texas
 * Fond du Lac County, Wisconsin
 * Ford County: Illinois; Kansas
 * Forest County: Pennsylvania; Wisconsin
 * Forrest County, Mississippi
 * Forsyth County: Georgia; North Carolina
 * Fort Bend County, Texas
 * Foster County, North Dakota
 * Fountain County, Indiana
 * Franklin County: Alabama; Arkansas; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Maine; Massachusetts; Mississippi; Missouri; Nebraska; New York; North Carolina; Ohio; Pennsylvania; Tennessee; Texas; Vermont; Virginia; Washington
 * Franklin Parish, Louisiana
 * Frederick County: Maryland; Virginia
 * Freeborn County, Minnesota
 * Freestone County, Texas
 * Fremont County: Colorado; Idaho; Iowa; Wyoming
 * Fresno County, California
 * Frio County, Texas
 * Frontier County, Nebraska
 * Fulton County: Arkansas; Georgia; Illinois; Indiana; Kentucky; New York; Ohio; Pennsylvania
 * Furnas County, Nebraska

G

 * Gadsden County, Florida
 * Gage County, Nebraska
 * Gaines County, Texas
 * Gallatin County: Illinois; Kentucky; Montana
 * Gallia County, Ohio
 * Galveston County, Texas
 * Garden County, Nebraska
 * Garfield County: Colorado; Montana; Nebraska; Oklahoma; Utah; 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; New York
 * Geneva County, Alabama
 * Gentry County, Missouri
 * George County, Mississippi
 * Georgetown County, South Carolina
 * Gibson County: Indiana; Tennessee
 * Gila County, Arizona
 * Gilchrist County, Florida
 * Giles County: Tennessee; Virginia
 * Gillespie County, Texas
 * Gilliam County, Oregon
 * Gilmer County: Georgia; 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; Virginia
 * Glynn County, Georgia
 * Gogebic County, Michigan
 * Golden Valley County: Montana; 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; Oklahoma
 * Grafton County, New Hampshire
 * Graham County: Arizona; Kansas; North Carolina
 * Grainger County, Tennessee
 * Grand County: Colorado; Utah
 * Grand Forks County, North Dakota
 * Grand Isle County, Vermont
 * Grand Traverse County, Michigan
 * Granite County, Montana
 * Grant County: Arkansas; Indiana; Kansas; Kentucky; Minnesota; Nebraska; New Mexico; North Dakota; Oklahoma; Oregon; South Dakota; Washington; West Virginia; Wisconsin
 * Grant Parish, Louisiana
 * Granville County, North Carolina
 * Gratiot County, Michigan
 * Graves County, Kentucky
 * Gray County: Kansas; Texas
 * Grays Harbor County, Washington
 * Grayson County: Kentucky; Texas; Virginia
 * Greeley County: Kansas; Nebraska
 * Green County: Kentucky; Wisconsin
 * Green Lake County, Wisconsin
 * Greenbrier County, West Virginia
 * Greene County: Alabama; Arkansas; Georgia; Illinois; Indiana; Iowa; Mississippi; Missouri; New York; North Carolina; Ohio; Pennsylvania; Tennessee; Virginia
 * Greenlee County, Arizona
 * Greensville County, Virginia
 * Greenup County, Kentucky
 * Greenville County, South Carolina
 * Greenwood County: Kansas; 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; Iowa; Missouri; Tennessee
 * Guadalupe County: New Mexico; Texas
 * Guam
 * Guánica Municipality, Puerto Rico
 * Guayama Municipality, Puerto Rico
 * Guayanilla Municipality, Puerto Rico
 * Guaynabo Municipality, Puerto Rico
 * Guernsey County, Ohio
 * Guilford County, North Carolina
 * Gulf County, Florida
 * Gunnison County, Colorado
 * Gurabo Municipality, Puerto Rico
 * Guthrie County, Iowa
 * Gwinnett County, Georgia

H

 * Haakon County, South Dakota
 * Habersham County, Georgia
 * Haines Borough, Alaska
 * Hale County: Alabama; Texas
 * Halifax County: North Carolina; Virginia
 * Hall County: Georgia; Nebraska; Texas
 * Hamblen County, Tennessee
 * Hamilton County: Florida; Illinois; Indiana; Iowa; Kansas; Nebraska; New York; Ohio; Tennessee; Texas
 * Hamlin County, South Dakota
 * Hampden County, Massachusetts
 * Hampshire County: Massachusetts; West Virginia
 * Hampton County, South Carolina
 * Hancock County: Georgia; Illinois; Indiana; Iowa; Kentucky; Maine; Mississippi; Ohio; Tennessee; 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; Texas
 * Hardin County: Illinois; Iowa; Kentucky; Ohio; Tennessee; Texas
 * Harding County: New Mexico; South Dakota
 * Hardy County, West Virginia
 * Harford County, Maryland
 * Harlan County: Kentucky; Nebraska
 * Harmon County, Oklahoma
 * Harnett County, North Carolina
 * Harney County, Oregon
 * Harper County: Kansas; Oklahoma
 * Harris County: Georgia; Texas
 * Harrison County: Indiana; Iowa; Kentucky; Mississippi; Missouri; Ohio; Texas; West Virginia
 * Hart County: Georgia; Kentucky
 * Hartford County, Connecticut
 * Hartley County, Texas
 * Harvey County, Kansas
 * Haskell County: Kansas; Oklahoma; Texas
 * Hatillo Municipality, Puerto Rico
 * Hawaiʻi County, Hawaii
 * Hawkins County, Tennessee
 * Hayes County, Nebraska
 * Hays County, Texas
 * Haywood County: North Carolina; Tennessee
 * Heard County, Georgia
 * Hemphill County, Texas
 * Hempstead County, Arkansas
 * Henderson County: Illinois; Kentucky; North Carolina; Tennessee; Texas
 * Hendricks County, Indiana
 * Hendry County, Florida
 * Hennepin County, Minnesota
 * Henrico County, Virginia
 * Henry County: Alabama; Georgia; Illinois; Indiana; Iowa; Kentucky; Missouri; Ohio; Tennessee; Virginia
 * Herkimer County, New York
 * Hernando County, Florida
 * Hertford County, North Carolina
 * Hettinger County, North Dakota
 * Hickman County: Kentucky; Tennessee
 * Hickory County, Missouri
 * Hidalgo County: New Mexico; Texas
 * Highland County: Ohio; Virginia
 * Highlands County, Florida
 * Hill County: Montana; Texas
 * Hillsborough County: Florida; 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; Mississippi; Ohio
 * Holt County: Missouri; Nebraska
 * Honolulu County, Hawaii
 * Hood County, Texas
 * Hood River County, Oregon
 * Hooker County, Nebraska
 * Hopkins County: Kentucky; Texas
 * Hormigueros Municipality, Puerto Rico
 * Horry County, South Carolina
 * Hot Spring County, Arkansas
 * Hot Springs County, Wyoming
 * Houghton County, Michigan
 * Houston County: Alabama; Georgia; Minnesota; Tennessee; Texas
 * Howard County: Arkansas; Indiana; Iowa; Maryland; Missouri; Nebraska; Texas
 * Howell County, Missouri
 * Howland Island, U.S. Minor Outlying Islands
 * Hubbard County, Minnesota
 * Hudson County, New Jersey
 * Hudspeth County, Texas
 * Huerfano County, Colorado
 * Hughes County: Oklahoma; South Dakota
 * Humacao Municipality, Puerto Rico
 * Humboldt County: California; Iowa; Nevada
 * Humphreys County: Mississippi; Tennessee
 * Hunt County, Texas
 * Hunterdon County, New Jersey
 * Huntingdon County, Pennsylvania
 * Huntington County, Indiana
 * Huron County: Michigan; Ohio
 * Hutchinson County: South Dakota; Texas
 * Hyde County: North Carolina; South Dakota

I

 * 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; Wisconsin
 * Iredell County, North Carolina
 * Irion County, Texas
 * Iron County: Michigan; Missouri; Utah; Wisconsin
 * Iroquois County, Illinois
 * Irwin County, Georgia
 * Isabela Municipality, Puerto Rico
 * 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

J

 * Jack County, Texas
 * Jackson County: Alabama; Arkansas; Colorado; Florida; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Michigan; Minnesota; Mississippi; Missouri; North Carolina; Ohio; Oklahoma; Oregon; South Dakota; Tennessee; Texas; West Virginia; Wisconsin
 * Jackson Parish, Louisiana
 * James City County, Virginia
 * Jarvis Island, U.S. Minor Outlying Islands
 * Jasper County: Georgia; Illinois; Indiana; Iowa; Mississippi; Missouri; South Carolina; Texas
 * Jay County, Indiana
 * Jayuya Municipality, Puerto Rico
 * Jeff Davis County: Georgia; Texas
 * Jefferson County: Alabama; Arkansas; Colorado; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Mississippi; Missouri; Montana; Nebraska; New York; Ohio; Oklahoma; Oregon; Pennsylvania; Tennessee; Texas; Washington; West Virginia; Wisconsin
 * Jefferson Parish, Louisiana
 * Jefferson Davis County, Mississippi
 * Jefferson Davis 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; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Missouri; Nebraska; Tennessee; Texas; Wyoming
 * Johnston Atoll, U.S. Minor Outlying Islands
 * Johnston County: North Carolina; Oklahoma
 * Jones County: Georgia; Iowa; Mississippi; North Carolina; South Dakota; Texas
 * Josephine County, Oregon
 * Juab County, Utah
 * Juana Díaz Municipality, Puerto Rico
 * Judith Basin County, Montana
 * Juncos Municipality, Puerto Rico
 * Juneau County, Wisconsin
 * Juneau City and Borough, Alaska
 * Juniata County, Pennsylvania

K

 * Kalamazoo County, Michigan
 * Kalawao County, Hawaii
 * Kalkaska County, Michigan
 * Kanabec County, Minnesota
 * Kanawha County, West Virginia
 * Kandiyohi County, Minnesota
 * Kane County: Illinois; 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; Texas
 * Kenedy County, Texas
 * Kennebec County, Maine
 * Kenosha County, Wisconsin
 * Kent County: Delaware; Maryland; Michigan; Rhode Island; 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; Washington
 * King George County, Virginia
 * King William County, Virginia
 * King and Queen County, Virginia
 * Kingfisher County, Oklahoma
 * Kingman County, Kansas
 * Kingman Reef, U.S. Minor Outlying Islands
 * Kings County: California; New York
 * Kingsbury County, South Dakota
 * Kinney County, Texas
 * Kiowa County: Colorado; Kansas; 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; Indiana; Kentucky; Maine; Missouri; Nebraska; Ohio; Tennessee; Texas
 * Kodiak Island Borough, Alaska
 * Koochiching County, Minnesota
 * Kootenai County, Idaho
 * Kosciusko County, Indiana
 * Kossuth County, Iowa
 * Kusilvak Census Area, Alaska

L

 * La Crosse County, Wisconsin
 * La Paz County, Arizona
 * La Plata County, Colorado
 * La Salle County, Texas
 * La Salle Parish, Louisiana
 * Labette County, Kansas
 * Lac qui Parle County, Minnesota
 * Lackawanna County, Pennsylvania
 * Laclede County, Missouri
 * Lafayette County: Arkansas; Florida; Mississippi; Missouri; Wisconsin
 * Lafayette Parish, Louisiana
 * Lafourche Parish, Louisiana
 * LaGrange County, Indiana
 * Lajas Municipality, Puerto Rico
 * Lake County: California; Colorado; Florida; Illinois; Indiana; Michigan; Minnesota; Montana; Ohio; Oregon; South Dakota; Tennessee
 * Lake and Peninsula Borough, Alaska
 * Lake of the Woods County, Minnesota
 * Lamar County: Alabama; Georgia; Mississippi; Texas
 * Lamb County, Texas
 * Lamoille County, Vermont
 * LaMoure County, North Dakota
 * Lampasas County, Texas
 * Lancaster County: Nebraska; Pennsylvania; South Carolina; Virginia
 * Lander County, Nevada
 * Lane County: Kansas; Oregon
 * Langlade County, Wisconsin
 * Lanier County, Georgia
 * Lapeer County, Michigan
 * LaPorte County, Indiana
 * Laramie County, Wyoming
 * Lares Municipality, Puerto Rico
 * Larimer County, Colorado
 * LaRue County, Kentucky
 * LaSalle County, Illinois
 * Las Animas County, Colorado
 * Las Marías Municipality, Puerto Rico
 * Las Piedras Municipality, Puerto Rico
 * Lassen County, California
 * Latah County, Idaho
 * Latimer County, Oklahoma
 * Lauderdale County: Alabama; Mississippi; Tennessee
 * Laurel County, Kentucky
 * Laurens County: Georgia; South Carolina
 * Lavaca County, Texas
 * Lawrence County: Alabama; Arkansas; Illinois; Indiana; Kentucky; Mississippi; Missouri; Ohio; Pennsylvania; South Dakota; 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; Arkansas; Florida; Georgia; Illinois; Iowa; Kentucky; Mississippi; North Carolina; South Carolina; Texas; Virginia
 * Leelanau County, Michigan
 * Leflore County, Mississippi
 * Lehigh County, Pennsylvania
 * Lemhi County, Idaho
 * Lenawee County, Michigan
 * Lenoir County, North Carolina
 * Leon County: Florida; Texas
 * Leslie County, Kentucky
 * Letcher County, Kentucky
 * Levy County, Florida
 * Lewis County: Idaho; Kentucky; Missouri; New York; Tennessee; Washington; West Virginia
 * Lewis and Clark County, Montana
 * Lexington County, South Carolina
 * Liberty County: Florida; Georgia; Montana; Texas
 * Licking County, Ohio
 * Limestone County: Alabama; Texas
 * Lincoln County: Arkansas; Colorado; Georgia; Idaho; Kansas; Kentucky; Maine; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Mexico; North Carolina; Oklahoma; Oregon; South Dakota; Tennessee; Washington; West Virginia; Wisconsin; Wyoming
 * Lincoln Parish, Louisiana
 * Linn County: Iowa; Kansas; Missouri; Oregon
 * Lipscomb County, Texas
 * Litchfield County, Connecticut
 * Little River County, Arkansas
 * Live Oak County, Texas
 * Livingston County: Illinois; Kentucky; Michigan; Missouri; New York
 * Livingston Parish, Louisiana
 * Llano County, Texas
 * Logan County: Arkansas; Colorado; Illinois; Kansas; Kentucky; Nebraska; North Dakota; Ohio; Oklahoma; West Virginia
 * Loíza Municipality, Puerto Rico
 * 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; Virginia
 * Loup County, Nebraska
 * Love County, Oklahoma
 * Loving County, Texas
 * Lowndes County: Alabama; Georgia; Mississippi
 * Lubbock County, Texas
 * Lucas County: Iowa; Ohio
 * Luce County, Michigan
 * Lumpkin County, Georgia
 * Luna County, New Mexico
 * Lunenburg County, Virginia
 * Luquillo Municipality, Puerto Rico
 * Luzerne County, Pennsylvania
 * Lycoming County, Pennsylvania
 * Lyman County, South Dakota
 * Lynn County, Texas
 * Lyon County: Iowa; Kansas; Kentucky; Minnesota; Nevada

M

 * Mackinac County, Michigan
 * Macomb County, Michigan
 * Macon County: Alabama; Georgia; Illinois; Missouri; North Carolina; Tennessee
 * Macoupin County, Illinois
 * Madera County, California
 * Madison County: Alabama; Arkansas; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kentucky; Mississippi; Missouri; Montana; Nebraska; New York; North Carolina; Ohio; Tennessee; Texas; Virginia
 * Madison Parish, Louisiana
 * Magoffin County, Kentucky
 * Mahaska County, Iowa
 * Mahnomen County, Minnesota
 * Mahoning County, Ohio
 * Major County, Oklahoma
 * Malheur County, Oregon
 * Manatee County, Florida
 * Manatí Municipality, Puerto Rico
 * Manistee County, Michigan
 * Manitowoc County, Wisconsin
 * Manu'a District, American Samoa
 * Marathon County, Wisconsin
 * Marengo County, Alabama
 * Maricao Municipality, Puerto Rico
 * Maricopa County, Arizona
 * Maries County, Missouri
 * Marin County, California
 * Marinette County, Wisconsin
 * Marion County: Alabama; Arkansas; Florida; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Mississippi; Missouri; Ohio; Oregon; South Carolina; Tennessee; Texas; West Virginia
 * Mariposa County, California
 * Marlboro County, South Carolina
 * Marquette County: Michigan; Wisconsin
 * Marshall County: Alabama; Illinois; Indiana; Iowa; Kansas; Kentucky; Minnesota; Mississippi; Oklahoma; South Dakota; Tennessee; West Virginia
 * Martin County: Florida; Indiana; Kentucky; Minnesota; North Carolina; Texas
 * Mason County: Illinois; Kentucky; Michigan; Texas; Washington; West Virginia
 * Massac County, Illinois
 * Matagorda County, Texas
 * Matanuska-Susitna Borough, Alaska
 * Mathews County, Virginia
 * Maui County, Hawaii
 * Maunabo Municipality, Puerto Rico
 * Maury County, Tennessee
 * Maverick County, Texas
 * Mayagüez Municipality, Puerto Rico
 * 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; West Virginia
 * McDuffie County, Georgia
 * McHenry County: Illinois; North Dakota
 * McIntosh County: Georgia; North Dakota; Oklahoma
 * McKean County, Pennsylvania
 * McKenzie County, North Dakota
 * McKinley County, New Mexico
 * McLean County: Illinois; Kentucky; North Dakota
 * McLennan County, Texas
 * McLeod County, Minnesota
 * McMinn County, Tennessee
 * McMullen County, Texas
 * McNairy County, Tennessee
 * McPherson County: Kansas; Nebraska; South Dakota
 * Meade County: Kansas; Kentucky; South Dakota
 * Meagher County, Montana
 * Mecklenburg County: North Carolina; Virginia
 * Mecosta County, Michigan
 * Medina County: Ohio; Texas
 * Meeker County, Minnesota
 * Meigs County: Ohio; Tennessee
 * Mellette County, South Dakota
 * Menard County: Illinois; Texas
 * Mendocino County, California
 * Menifee County, Kentucky
 * Menominee County: Michigan; Wisconsin
 * Merced County, California
 * Mercer County: Illinois; Kentucky; Missouri; New Jersey; North Dakota; Ohio; Pennsylvania; West Virginia
 * Meriwether County, Georgia
 * Merrick County, Nebraska
 * Merrimack County, New Hampshire
 * Mesa County, Colorado
 * Metcalfe County, Kentucky
 * Miami County: Indiana; Kansas; Ohio
 * Miami-Dade County, Florida
 * Middlesex County: Connecticut; Massachusetts; New Jersey; Virginia
 * Midland County: Michigan; Texas
 * Midway Atoll, U.S. Minor Outlying Islands
 * Mifflin County, Pennsylvania
 * Milam County, Texas
 * Millard County, Utah
 * Mille Lacs County, Minnesota
 * Miller County: Arkansas; Georgia; Missouri
 * Mills County: Iowa; Texas
 * Milwaukee County, Wisconsin
 * Miner County, South Dakota
 * Mineral County: Colorado; Montana; Nevada; West Virginia
 * Mingo County, West Virginia
 * Minidoka County, Idaho
 * Minnehaha County, South Dakota
 * Missaukee County, Michigan
 * Mississippi County: Arkansas; Missouri
 * Missoula County, Montana
 * Mitchell County: Georgia; Iowa; Kansas; North Carolina; Texas
 * Mobile County, Alabama
 * Moca Municipality, Puerto Rico
 * 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; Arkansas; Florida; Georgia; Illinois; Indiana; Iowa; Kentucky; Michigan; Mississippi; Missouri; New York; Ohio; Pennsylvania; Tennessee; West Virginia; Wisconsin
 * Montague County, Texas
 * Montcalm County, Michigan
 * Monterey County, California
 * Montezuma County, Colorado
 * Montgomery County: Alabama; Arkansas; Georgia; Illinois; Indiana; Iowa; Kansas; Kentucky; Maryland; Mississippi; Missouri; New York; North Carolina; Ohio; Pennsylvania; Tennessee; Texas; Virginia
 * Montmorency County, Michigan
 * Montour County, Pennsylvania
 * Montrose County, Colorado
 * Moody County, South Dakota
 * Moore County: North Carolina; Tennessee; Texas
 * Mora County, New Mexico
 * Morehouse Parish, Louisiana
 * Morgan County: Alabama; Colorado; Georgia; Illinois; Indiana; Kentucky; Missouri; Ohio; Tennessee; Utah; West Virginia
 * Morovis Municipality, Puerto Rico
 * Morrill County, Nebraska
 * Morris County: Kansas; New Jersey; Texas
 * Morrison County, Minnesota
 * Morrow County: Ohio; Oregon
 * Morton County: Kansas; North Dakota
 * Motley County, Texas
 * Moultrie County, Illinois
 * Mountrail County, North Dakota
 * Mower County, Minnesota
 * Muhlenberg County, Kentucky
 * Multnomah County, Oregon
 * Murray County: Georgia; Minnesota; Oklahoma
 * Muscatine County, Iowa
 * Muscogee County, Georgia
 * Muskegon County, Michigan
 * Muskingum County, Ohio
 * Muskogee County, Oklahoma
 * Musselshell County, Montana

N

 * Nacogdoches County, Texas
 * Naguabo Municipality, Puerto Rico
 * Nance County, Nebraska
 * Town and County of Nantucket, Massachusetts
 * Napa County, California
 * Naranjito Municipality, Puerto Rico
 * Nash County, North Carolina
 * Nassau County: Florida; New York
 * Natchitoches Parish, Louisiana
 * Natrona County, Wyoming
 * Navajo County, Arizona
 * Navarro County, Texas
 * Navassa Island, U.S. Minor Outlying Islands
 * Nelson County: Kentucky; North Dakota; Virginia
 * Nemaha County: Kansas; Nebraska
 * Neosho County, Kansas
 * Neshoba County, Mississippi
 * Ness County, Kansas
 * Nevada County: Arkansas; 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
 * Newton County: Arkansas; Georgia; Indiana; Mississippi; Missouri; Texas
 * Nez Perce County, Idaho
 * Niagara County, New York
 * Nicholas County: Kentucky; West Virginia
 * Nicollet County, Minnesota
 * Niobrara County, Wyoming
 * Noble County: Indiana; Ohio; Oklahoma
 * Nobles County, Minnesota
 * Nodaway County, Missouri
 * Nolan County, Texas
 * Nome Census Area, Alaska
 * Norfolk County, Massachusetts
 * Norman County, Minnesota
 * North Slope Borough, Alaska
 * Northampton County: North Carolina; Pennsylvania; Virginia
 * Northern Islands Municipality, Northern Mariana Islands
 * Northumberland County: Pennsylvania; Virginia
 * Northwest Arctic Borough, Alaska
 * Norton County, Kansas
 * Nottoway County, Virginia
 * Nowata County, Oklahoma
 * Noxubee County, Mississippi
 * Nuckolls County, Nebraska
 * Nueces County, Texas
 * Nye County, Nevada

O

 * O'Brien County, Iowa
 * Oakland County, Michigan
 * Obion County, Tennessee
 * Ocean County, New Jersey
 * Oceana County, Michigan
 * Ochiltree County, Texas
 * Oconee County: Georgia; South Carolina
 * Oconto County, Wisconsin
 * Ogemaw County, Michigan
 * Oglala Lakota County, South Dakota
 * Ogle County, Illinois
 * Oglethorpe County, Georgia
 * Ohio County: Indiana; Kentucky; 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; Texas
 * Oliver County, North Dakota
 * Olmsted County, Minnesota
 * Oneida County: Idaho; New York; Wisconsin
 * Onondaga County, New York
 * Onslow County, North Carolina
 * Ontario County, New York
 * Ontonagon County, Michigan
 * Orange County: California; Florida; Indiana; New York; North Carolina; Texas; Vermont; Virginia
 * Orangeburg County, South Carolina
 * Oregon County, Missouri
 * Orleans County: New York; Vermont
 * Orleans Parish, Louisiana
 * Orocovis Municipality, Puerto Rico
 * Osage County: Kansas; Missouri; Oklahoma
 * Osborne County, Kansas
 * Osceola County: Florida; Iowa; Michigan
 * Oscoda County, Michigan
 * Oswego County, New York
 * Otero County: Colorado; New Mexico
 * Otoe County, Nebraska
 * Otsego County: Michigan; New York
 * Ottawa County: Kansas; Michigan; Ohio; Oklahoma
 * Otter Tail County, Minnesota
 * Ouachita County, Arkansas
 * Ouachita Parish, Louisiana
 * Ouray County, Colorado
 * Outagamie County, Wisconsin
 * Overton County, Tennessee
 * Owen County: Indiana; Kentucky
 * Owsley County, Kentucky
 * Owyhee County, Idaho
 * Oxford County, Maine
 * Ozark County, Missouri
 * Ozaukee County, Wisconsin

P

 * Pacific County, Washington
 * Page County: Iowa; Virginia
 * Palm Beach County, Florida
 * Palmyra Atoll, U.S. Minor Outlying Islands
 * Palo Alto County, Iowa
 * Palo Pinto County, Texas
 * Pamlico County, North Carolina
 * Panola County: Mississippi; Texas
 * Park County: Colorado; Montana; Wyoming
 * Parke County, Indiana
 * Parker County, Texas
 * Parmer County, Texas
 * Pasco County, Florida
 * Pasquotank County, North Carolina
 * Passaic County, New Jersey
 * Patillas Municipality, Puerto Rico
 * Patrick County, Virginia
 * Paulding County: Georgia; Ohio
 * Pawnee County: Kansas; Nebraska; 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; West Virginia
 * Pennington County: Minnesota; South Dakota
 * Penobscot County, Maine
 * Peñuelas Municipality, Puerto Rico
 * Peoria County, Illinois
 * Pepin County, Wisconsin
 * Perkins County: Nebraska; South Dakota
 * Perquimans County, North Carolina
 * Perry County: Alabama; Arkansas; Illinois; Indiana; Kentucky; Mississippi; Missouri; Ohio; Pennsylvania; Tennessee
 * Pershing County, Nevada
 * Person County, North Carolina
 * Petersburg Borough, Alaska
 * Petroleum County, Montana
 * Pettis County, Missouri
 * Phelps County: Missouri; Nebraska
 * Philadelphia County, Pennsylvania
 * Phillips County: Arkansas; Colorado; Kansas; Montana
 * Piatt County, Illinois
 * Pickaway County, Ohio
 * Pickens County: Alabama; Georgia; South Carolina
 * Pickett County, Tennessee
 * Pierce County: Georgia; Nebraska; North Dakota; Washington; Wisconsin
 * Pike County: Alabama; Arkansas; Georgia; Illinois; Indiana; Kentucky; Mississippi; Missouri; Ohio; 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; Nebraska; Wyoming
 * Pleasants County, West Virginia
 * Plumas County, California
 * Plymouth County: Iowa; Massachusetts
 * Pocahontas County: Iowa; West Virginia
 * Poinsett County, Arkansas
 * Pointe Coupee Parish, Louisiana
 * Polk County: Arkansas; Florida; Georgia; Iowa; Minnesota; Missouri; Nebraska; North Carolina; Oregon; Tennessee; Texas; Wisconsin
 * Ponce Municipality, Puerto Rico
 * Pondera County, Montana
 * Pontotoc County: Mississippi; Oklahoma
 * Pope County: Arkansas; Illinois; Minnesota
 * Portage County: Ohio; Wisconsin
 * Porter County, Indiana
 * Posey County, Indiana
 * Pottawatomie County: Kansas; Oklahoma
 * Pottawattamie County, Iowa
 * Potter County: Pennsylvania; South Dakota; Texas
 * Powder River County, Montana
 * Powell County: Kentucky; Montana
 * Power County, Idaho
 * Poweshiek County, Iowa
 * Powhatan County, Virginia
 * Prairie County: Arkansas; 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; Georgia; Illinois; Indiana; Kentucky; Missouri; Virginia
 * Pushmataha County, Oklahoma
 * Putnam County: Florida; Georgia; Illinois; Indiana; Missouri; New York; Ohio; Tennessee; West Virginia

Q

 * Quay County, New Mexico
 * Quebradillas Municipality, Puerto Rico
 * Queen Anne's County, Maryland
 * Queens County, New York
 * Quitman County: Georgia; Mississippi

R

 * Rabun County, Georgia
 * Racine County, Wisconsin
 * Rains County, Texas
 * Raleigh County, West Virginia
 * Ralls County, Missouri
 * Ramsey County: Minnesota; North Dakota
 * Randall County, Texas
 * Randolph County: Alabama; Arkansas; Georgia; Illinois; Indiana; Missouri; North Carolina; 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; North Dakota
 * Republic County, Kansas
 * Reynolds County, Missouri
 * Rhea County, Tennessee
 * Rice County: Kansas; Minnesota
 * Rich County, Utah
 * Richardson County, Nebraska
 * Richland County: Illinois; Montana; North Dakota; Ohio; South Carolina; Wisconsin
 * Richland Parish, Louisiana
 * Richmond County: Georgia; New York; North Carolina; Virginia
 * Riley County, Kansas
 * Rincón Municipality, Puerto Rico
 * Ringgold County, Iowa
 * Rio Arriba County, New Mexico
 * Rio Blanco County, Colorado
 * Rio Grande County, Colorado
 * Río Grande Municipality, Puerto Rico
 * Ripley County: Indiana; Missouri
 * Ritchie County, West Virginia
 * Riverside County, California
 * Roane County: Tennessee; West Virginia
 * Roanoke County, Virginia
 * Roberts County: South Dakota; Texas
 * Robertson County: Kentucky; Tennessee; Texas
 * Robeson County, North Carolina
 * Rock County: Minnesota; Nebraska; Wisconsin
 * Rock Island County, Illinois
 * Rockbridge County, Virginia
 * Rockcastle County, Kentucky
 * Rockdale County, Georgia
 * Rockingham County: New Hampshire; North Carolina; 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; New Mexico
 * Roscommon County, Michigan
 * Rose Atoll, American Samoa
 * Roseau County, Minnesota
 * Rosebud County, Montana
 * Ross County, Ohio
 * Rota Municipality, Northern Mariana Islands
 * Routt County, Colorado
 * Rowan County: Kentucky; North Carolina
 * Runnels County, Texas
 * Rush County: Indiana; Kansas
 * Rusk County: Texas; Wisconsin
 * Russell County: Alabama; Kansas; Kentucky; Virginia
 * Rutherford County: North Carolina; Tennessee
 * Rutland County, Vermont

S

 * Sabana Grande Municipality, Puerto Rico
 * Sabine County, Texas
 * Sabine Parish, Louisiana
 * Sac County, Iowa
 * Sacramento County, California
 * Sagadahoc County, Maine
 * Saginaw County, Michigan
 * Saguache County, Colorado
 * Saint Bernard Parish, Louisiana
 * Saint Charles County, Missouri
 * Saint Charles Parish, Louisiana
 * Saint Clair County: Alabama; Illinois; Michigan; Missouri
 * Saint Croix County, Wisconsin
 * Saint Croix Island, U.S. Virgin Islands
 * Saint Francis County, Arkansas
 * Saint Francois County, Missouri
 * Saint Helena Parish, Louisiana
 * Saint James Parish, Louisiana
 * Saint John Island, U.S. Virgin Islands
 * Saint John the Baptist Parish, Louisiana
 * Saint Johns County, Florida
 * Saint Joseph County: Indiana; Michigan
 * Saint Landry Parish, Louisiana
 * Saint Lawrence County, New York
 * Saint Louis County: Minnesota; Missouri
 * Saint Lucie County, Florida
 * Saint Martin Parish, Louisiana
 * Saint Mary Parish, Louisiana
 * Saint Mary's County, Maryland
 * Saint Tammany Parish, Louisiana
 * Saint Thomas Island, U.S. Virgin Islands
 * Sainte Genevieve County, Missouri
 * Saipan Municipality, Northern Mariana Islands
 * Salem County, New Jersey
 * Salinas Municipality, Puerto Rico
 * Saline County: Arkansas; Illinois; Kansas; Missouri; 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
 * City and County of San Francisco, California
 * San Germán Municipality, Puerto Rico
 * San Jacinto County, Texas
 * San Joaquin County, California
 * San Juan County: Colorado; New Mexico; Utah; Washington
 * San Juan Municipality, Puerto Rico
 * San Lorenzo Municipality, Puerto Rico
 * San Luis Obispo County, California
 * San Mateo County, California
 * San Miguel County: Colorado; New Mexico
 * San Patricio County, Texas
 * San Saba County, Texas
 * San Sebastián Municipality, Puerto Rico
 * 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; California
 * Santa Fe County, New Mexico
 * Santa Isabel Municipality, Puerto Rico
 * 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; Missouri; New York
 * Schuylkill County, Pennsylvania
 * Scioto County, Ohio
 * Scotland County: Missouri; North Carolina
 * Scott County: Arkansas; Illinois; Indiana; Iowa; Kansas; Kentucky; Minnesota; Mississippi; Missouri; Tennessee; Virginia
 * Scotts Bluff County, Nebraska
 * Screven County, Georgia
 * Scurry County, Texas
 * Searcy County, Arkansas
 * Sebastian County, Arkansas
 * Sedgwick County: Colorado; Kansas
 * Seminole County: Florida; Georgia; Oklahoma
 * Seneca County: New York; Ohio
 * Sequatchie County, Tennessee
 * Sequoyah County, Oklahoma
 * Sevier County: Arkansas; Tennessee; Utah
 * Seward County: Kansas; 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; Illinois; Indiana; Iowa; Kentucky; Missouri; Ohio; Tennessee; Texas
 * Shenandoah County, Virginia
 * Sherburne County, Minnesota
 * Sheridan County: Kansas; Montana; Nebraska; North Dakota; Wyoming
 * Sherman County: Kansas; Nebraska; Oregon; Texas
 * Shiawassee County, Michigan
 * Shoshone County, Idaho
 * Sibley County, Minnesota
 * Sierra County: California; New Mexico
 * Silver Bow County, Montana
 * Simpson County: Kentucky; Mississippi
 * Sioux County: Iowa; Nebraska; North Dakota
 * Siskiyou County, California
 * Sitka, Alaska
 * Skagit County, Washington
 * Skagway-Hoonah-Angoon Census Area, Alaska
 * Skamania County, Washington
 * Slope County, North Dakota
 * Smith County: Kansas; Mississippi; Tennessee; Texas
 * Smyth County, Virginia
 * Snohomish County, Washington
 * Snyder County, Pennsylvania
 * Socorro County, New Mexico
 * Solano County, California
 * Somerset County: Maine; Maryland; New Jersey; 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; Kentucky
 * Spink County, South Dakota
 * Spokane County, Washington
 * Spotsylvania County, Virginia
 * Stafford County: Kansas; Virginia
 * Stanislaus County, California
 * Stanley County, South Dakota
 * Stanly County, North Carolina
 * Stanton County: Kansas; Nebraska
 * Stark County: Illinois; North Dakota; Ohio
 * Starke County, Indiana
 * Starr County, Texas
 * Stearns County, Minnesota
 * Steele County: Minnesota; North Dakota
 * Stephens County: Georgia; Oklahoma; Texas
 * Stephenson County, Illinois
 * Sterling County, Texas
 * Steuben County: Indiana; New York
 * Stevens County: Kansas; Minnesota; Washington
 * Stewart County: Georgia; Tennessee
 * Stillwater County, Montana
 * Stoddard County, Missouri
 * Stokes County, North Carolina
 * Stone County: Arkansas; Mississippi; Missouri
 * Stonewall County, Texas
 * Storey County, Nevada
 * Story County, Iowa
 * Strafford County, New Hampshire
 * Stutsman County, North Dakota
 * Sublette County, Wyoming
 * Suffolk County: Massachusetts; New York
 * Sullivan County: Indiana; Missouri; New Hampshire; New York; Pennsylvania; Tennessee
 * Sully County, South Dakota
 * Summers County, West Virginia
 * Summit County: Colorado; Ohio; Utah
 * Sumner County: Kansas; Tennessee
 * Sumter County: Alabama; Florida; Georgia; South Carolina
 * Sunflower County, Mississippi
 * Surry County: North Carolina; Virginia
 * Susquehanna County, Pennsylvania
 * Sussex County: Delaware; New Jersey; Virginia
 * Sutter County, California
 * Sutton County, Texas
 * Suwannee County, Florida
 * Swain County, North Carolina
 * Swains Island, American Samoa
 * Sweet Grass County, Montana
 * Sweetwater County, Wyoming
 * Swift County, Minnesota
 * Swisher County, Texas
 * Switzerland County, Indiana

T

 * Talbot County: Georgia; 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; Georgia; Iowa; Kentucky; Texas; West Virginia; Wisconsin
 * Tazewell County: Illinois; Virginia
 * Tehama County, California
 * Telfair County, Georgia
 * Teller County, Colorado
 * Tensas Parish, Louisiana
 * Terrebonne Parish, Louisiana
 * Terrell County: Georgia; Texas
 * Terry County, Texas
 * Teton County: Idaho; Montana; Wyoming
 * Texas County: Missouri; Oklahoma
 * Thayer County, Nebraska
 * Thomas County: Georgia; Kansas; Nebraska
 * Throckmorton County, Texas
 * Thurston County: Nebraska; Washington
 * Tift County, Georgia
 * Tillamook County, Oregon
 * Tillman County, Oklahoma
 * Tinian Municipality, Northern Mariana Islands
 * Tioga County: New York; Pennsylvania
 * Tippah County, Mississippi
 * Tippecanoe County, Indiana
 * Tipton County: Indiana; Tennessee
 * Tishomingo County, Mississippi
 * Titus County, Texas
 * Toa Alta Municipality, Puerto Rico
 * Toa Baja Municipality, Puerto Rico
 * Todd County: Kentucky; Minnesota; 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; Texas
 * Tripp County, South Dakota
 * Troup County, Georgia
 * Trousdale County, Tennessee
 * Trujillo Alto Municipality, Puerto Rico
 * Trumbull County, Ohio
 * Tucker County, West Virginia
 * Tulare County, California
 * Tulsa County, Oklahoma
 * Tunica County, Mississippi
 * Tuolumne County, California
 * Turner County: Georgia; South Dakota
 * Tuscaloosa County, Alabama
 * Tuscarawas County, Ohio
 * Tuscola County, Michigan
 * Twiggs County, Georgia
 * Twin Falls County, Idaho
 * Tyler County: Texas; West Virginia
 * Tyrrell County, North Carolina

U

 * Uinta County, Wyoming
 * Uintah County, Utah
 * Ulster County, New York
 * Umatilla County, Oregon
 * Unicoi County, Tennessee
 * Union County: Arkansas; Florida; Georgia; Illinois; Indiana; Iowa; Kentucky; Mississippi; New Jersey; New Mexico; North Carolina; Ohio; Oregon; Pennsylvania; South Carolina; South Dakota; Tennessee
 * Union Parish, Louisiana
 * Upshur County: Texas; West Virginia
 * Upson County, Georgia
 * Upton County, Texas
 * Utah County, Utah
 * Utuado Municipality, Puerto Rico
 * Uvalde County, Texas

V

 * Val Verde County, Texas
 * Valencia County, New Mexico
 * Valley County: Idaho; Montana; Nebraska
 * Van Buren County: Arkansas; Iowa; Michigan; Tennessee
 * Van Wert County, Ohio
 * Van Zandt County, Texas
 * Vance County, North Carolina
 * Vanderburgh County, Indiana
 * Vega Alta Municipality, Puerto Rico
 * Vega Baja Municipality, Puerto Rico
 * Venango County, Pennsylvania
 * Ventura County, California
 * Vermilion County, Illinois
 * Vermilion Parish, Louisiana
 * Vermillion County, Indiana
 * Vernon County: Missouri; Wisconsin
 * Vernon Parish, Louisiana
 * Victoria County, Texas
 * Vieques Municipality, Puerto Rico
 * Vigo County, Indiana
 * Vilas County, Wisconsin
 * Villalba Municipality, Puerto Rico
 * Vinton County, Ohio
 * Volusia County, Florida

W

 * Wabash County: Illinois; Indiana
 * Wabasha County, Minnesota
 * Wabaunsee County, Kansas
 * Wadena County, Minnesota
 * Wagoner County, Oklahoma
 * Wahkiakum County, Washington
 * Wake County, North Carolina
 * Wake Island, U.S. Minor Outlying Islands
 * Wakulla County, Florida
 * Waldo County, Maine
 * Walker County: Alabama; Georgia; Texas
 * Walla Walla County, Washington
 * Wallace County, Kansas
 * Waller County, Texas
 * Wallowa County, Oregon
 * Walsh County, North Dakota
 * Walthall County, Mississippi
 * Walton County: Florida; Georgia
 * Walworth County: South Dakota; Wisconsin
 * Wapello County, Iowa
 * Ward County: North Dakota; Texas
 * Ware County, Georgia
 * Warren County: Georgia; Illinois; Indiana; Iowa; Kentucky; Mississippi; Missouri; New Jersey; New York; North Carolina; Ohio; Pennsylvania; Tennessee; Virginia
 * Warrick County, Indiana
 * Wasatch County, Utah
 * Wasco County, Oregon
 * Waseca County, Minnesota
 * Washakie County, Wyoming
 * Washburn County, Wisconsin
 * Washington County: Alabama; Arkansas; Colorado; Florida; Georgia; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Maine; Maryland; Minnesota; Mississippi; Missouri; Nebraska; New York; North Carolina; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; Tennessee; Texas; Utah; Vermont; Virginia; 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; Illinois; Indiana; Iowa; Kentucky; Michigan; Mississippi; Missouri; Nebraska; New York; North Carolina; Ohio; Pennsylvania; Tennessee; Utah; West Virginia
 * Weakley County, Tennessee
 * Webb County, Texas
 * Weber County, Utah
 * Webster County: Georgia; Iowa; Kentucky; Mississippi; Missouri; Nebraska; West Virginia
 * Webster Parish, Louisiana
 * Weld County, Colorado
 * Wells County: Indiana; North Dakota
 * West Baton Rouge Parish, Louisiana
 * West Carroll Parish, Louisiana
 * West Feliciana Parish, Louisiana
 * Westchester County, New York
 * Western District, American Samoa
 * Westmoreland County: Pennsylvania; Virginia
 * Weston County, Wyoming
 * Wetzel County, West Virginia
 * Wexford County, Michigan
 * Wharton County, Texas
 * Whatcom County, Washington
 * Wheatland County, Montana
 * Wheeler County: Georgia; Nebraska; Oregon; Texas
 * White County: Arkansas; Georgia; Illinois; Indiana; Tennessee
 * White Pine County, Nevada
 * Whiteside County, Illinois
 * Whitfield County, Georgia
 * Whitley County: Indiana; Kentucky
 * Whitman County, Washington
 * Wibaux County, Montana
 * Wichita County: Kansas; Texas
 * Wicomico County, Maryland
 * Wilbarger County, Texas
 * Wilcox County: Alabama; Georgia
 * Wilkes County: Georgia; North Carolina
 * Wilkin County, Minnesota
 * Wilkinson County: Georgia; Mississippi
 * Will County, Illinois
 * Willacy County, Texas
 * Williams County: North Dakota; Ohio
 * Williamsburg County, South Carolina
 * Williamson County: Illinois; Tennessee; Texas
 * Wilson County: Kansas; North Carolina; Tennessee; Texas
 * Windham County: Connecticut; Vermont
 * Windsor County, Vermont
 * Winkler County, Texas
 * Winn Parish, Louisiana
 * Winnebago County: Illinois; Iowa; Wisconsin
 * Winneshiek County, Iowa
 * Winona County, Minnesota
 * Winston County: Alabama; Mississippi
 * Wirt County, West Virginia
 * Wise County: Texas; Virginia
 * Wolfe County, Kentucky
 * Wood County: Ohio; Texas; West Virginia; Wisconsin
 * Woodbury County, Iowa
 * Woodford County: Illinois; Kentucky
 * Woodruff County, Arkansas
 * Woods County, Oklahoma
 * Woodson County, Kansas
 * Woodward County, Oklahoma
 * Worcester County: Maryland; Massachusetts
 * Worth County: Georgia; Iowa; Missouri
 * Wright County: Iowa; Minnesota; Missouri
 * Wyandot County, Ohio
 * Wyandotte County, Kansas
 * Wyoming County: New York; Pennsylvania; West Virginia
 * Wythe County, Virginia

Y

 * Yabucoa Municipality, Puerto Rico
 * 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
 * Yauco Municipality, Puerto Rico
 * 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; Nebraska; Pennsylvania; South Carolina; Virginia
 * Young County, Texas
 * Yuba County, California
 * Yukon–Koyukuk Census Area, Alaska
 * Yuma County: Arizona; Colorado

Z

 * Zapata County, Texas
 * Zavala County, Texas
 * Ziebach County, South Dakota