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Index of U.S. counties
From Wikipedia, the free encyclopedia
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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
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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
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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
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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
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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
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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
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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
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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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
References
- "State & County QuickFacts". United States Census Bureau. Archived from the original on October 15, 2012. Retrieved June 4, 2010.
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