The United States has 3,142 counties or county equivalents.
A[]
- Abbeville County, South Carolina
- Acadia Parish, Louisiana
- Accomack County, Virginia
- Ada County, Idaho
- Adair County: IA; KY; MO; OK
- Adams County: CO; ID; IL; IN; IA; MS; NE; ND; OH; PA; WA; WI
- Addison County, Vermont
- Aiken County, South Carolina
- Aitkin County, Minnesota
- Alachua County, Florida
- Alamance County, North Carolina
- Alameda County, California
- Alamosa County, Colorado
- Albany County: NY; WY
- Albemarle County, Virginia
- Alcona County, Michigan
- Alcorn County, Mississippi
- Aleutians East Borough, Alaska
- Aleutians West Census Area, Alaska
- Alexander County: IL; NC
- Alfalfa County, Oklahoma
- Alger County, Michigan
- Allamakee County, Iowa
- Allegan County, Michigan
- Allegany County: MD; NY
- Alleghany County: NC; VA
- Allegheny County, Pennsylvania
- Allen County: IN; KS; KY; OH
- Allen Parish, Louisiana
- Allendale County, South Carolina
- Alpena County, Michigan
- Alpine County, California
- Amador County, California
- Amelia County, Virginia
- Amherst County, Virginia
- Amite County, Mississippi
- Anchorage Borough, Alaska (a consolidated city-borough under Alaska law)
- Anderson County: KS; KY; SC; TN; TX
- Andrew County, Missouri
- Andrews County, Texas
- Androscoggin County, Maine
- Angelina County, Texas
- Anne Arundel County, Maryland
- Anoka County, Minnesota
- Anson County, North Carolina
- Antelope County, Nebraska
- Antrim County, Michigan
- Apache County, Arizona
- Appanoose County, Iowa
- Appling County, Georgia
- Appomattox County, Virginia
- Aransas County, Texas
- Arapahoe County, Colorado
- Archer County, Texas
- Archuleta County, Colorado
- Arenac County, Michigan
- Arkansas County, Arkansas
- Arlington County, Virginia
- Armstrong County: PA; TX
- Aroostook County, Maine
- Arthur County, Nebraska
- Ascension Parish, Louisiana
- Ashe County, North Carolina
- Ashland County: OH; WI
- Ashley County, Arkansas
- Ashtabula County, Ohio
- Asotin County, Washington
- Assumption Parish, Louisiana
- Atascosa County, Texas
- Atchison County: KS; MO
- 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: FL; GA; OR
- Baldwin County: AL; GA
- Ballard County, Kentucky
- Baltimore, Maryland (Independent city)
- 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: AL; WV
- Barnes County, North Dakota
- Barnstable County, Massachusetts
- Barnwell County, South Carolina
- Barren County, Kentucky
- Barron County, Wisconsin
- Barrow County, Georgia
- Barry County: MI; MO
- Bartholomew County, Indiana
- Barton County: KS; MO
- Bartow County, Georgia
- Bastrop County, Texas
- Bates County, Missouri
- Bath County: KY; VA
- Baxter County, Arkansas
- Bay County: FL; MI
- Bayfield County, Wisconsin
- Baylor County, Texas
- Beadle County, South Dakota
- Bear Lake County, Idaho
- Beaufort County: NC; SC
- Beauregard Parish, Louisiana
- Beaver County: OK; PA; UT
- Beaverhead County, Montana
- Becker County, Minnesota
- Beckham County, Oklahoma
- Bedford County: PA; TN; VA
- Bee County, Texas
- Belknap County, New Hampshire
- Bell County: KY; TX
- 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: AR; IN; IA; MN; MS; MO; OR; TN; WA
- Benzie County, Michigan
- Bergen County, New Jersey
- Berkeley County: SC; WV
- Berks County, Pennsylvania
- Berkshire County, Massachusetts
- Bernalillo County, New Mexico
- Berrien County: GA; MI
- Bertie County, North Carolina
- Bethel Census Area, Alaska
- Bexar County, Texas
- Bibb County: AL; GA
- Bienville Parish, Louisiana
- Big Horn County: MT; WY
- Big Stone County, Minnesota
- Billings County, North Dakota
- Bingham County, Idaho
- Black Hawk County, Iowa
- Blackford County, Indiana
- Bladen County, North Carolina
- Blaine County: ID; MT; NE; OK
- Blair County, Pennsylvania
- Blanco County, Texas
- Bland County, Virginia
- Bleckley County, Georgia
- Bledsoe County, Tennessee
- Blount County: AL; TN
- 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: AR; IL; IN; IA; KY; MO; NE; WV
- Borden County, Texas
- Bosque County, Texas
- Bossier Parish, Louisiana
- Botetourt County, Virginia
- Bottineau County, North Dakota
- Boulder County, Colorado
- Boundary County, Idaho
- Bourbon County: KS; KY
- Bowie County, Texas
- Bowman County, North Dakota
- Box Butte County, Nebraska
- Box Elder County, Utah
- Boyd County: KY; NE
- Boyle County, Kentucky
- Bracken County, Kentucky
- Bradford County: FL; PA
- Bradley County: AR; TN
- 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: MA; RI
- Broadwater County, Montana
- Bronx County, New York
- Brooke County, West Virginia
- Brookings County, South Dakota
- Brooks County: GA; TX
- Broome County, New York
- City-County of Broomfield, Colorado
- Broward County, Florida
- Brown County: IL; IN; KS; MN; NE; OH; SD; TX; WI
- Brule County, South Dakota
- Brunswick County: NC; VA
- Bryan County: GA; OK
- Buchanan County: IA; MO; VA
- Buckingham County, Virginia
- Bucks County, Pennsylvania
- Buena Vista County, Iowa
- Buffalo County: NE; SD; WI
- Bullitt County, Kentucky
- Bulloch County, Georgia
- Bullock County, Alabama
- Buncombe County, North Carolina
- Bureau County, Illinois
- Burke County: GA; NC; ND
- Burleigh County, North Dakota
- Burleson County, Texas
- Burlington County, New Jersey
- Burnet County, Texas
- Burnett County, Wisconsin
- Burt County, Nebraska
- Butler County: AL; IA; KS; KY; MO; NE; OH; PA
- Butte County: CA; ID; SD
- Butts County, Georgia
C[]
- Cabarrus County, North Carolina
- Cabell County, West Virginia
- Cache County, Utah
- Caddo County, Oklahoma
- Caddo Parish, Louisiana
- Calaveras County, California
- Calcasieu Parish, Louisiana
- Caldwell County: KY; MO; NC; TX
- Caldwell Parish, Louisiana
- Caledonia County, Vermont
- Calhoun County: AL; AR; FL; GA; IL; IA; MI; MS; SC; TX; WV
- Callahan County, Texas
- Callaway County, Missouri
- Calloway County, Kentucky
- Calumet County, Wisconsin
- Calvert County, Maryland
- Camas County, Idaho
- Cambria County, Pennsylvania
- Camden County: GA; MO; NJ; NC
- Cameron County: PA; TX
- Cameron Parish, Louisiana
- Camp County, Texas
- Campbell County: KY; SD; TN; VA; WY
- Canadian County, Oklahoma
- Candler County, Georgia
- Cannon County, Tennessee
- Canyon County, Idaho
- Cape Girardeau County, Missouri
- Cape May County, New Jersey
- Carbon County: MT; PA; UT; WY
- Caribou County, Idaho
- Carlisle County, Kentucky
- Carlton County, Minnesota
- Caroline County: MD; VA
- Carroll County: AR; GA; IL; IN; IA; KY; MD; MS; MO; NH; OH; TN; VA
- Carson City, Nevada (Independent city)
- Carson County, Texas
- Carter County: KY; MO; MT; OK; TN
- Carteret County, North Carolina
- Carver County, Minnesota
- Cascade County, Montana
- Casey County, Kentucky
- Cass County: IL; IN; IA; MI; MN; MO; NE; ND; TX
- Cassia County, Idaho
- Castro County, Texas
- Caswell County, North Carolina
- Catahoula Parish, Louisiana
- Catawba County, North Carolina
- Catoosa County, Georgia
- Catron County, New Mexico
- Cattaraugus County, New York
- Cavalier County, North Dakota
- Cayuga County, New York
- Cecil County, Maryland
- Cedar County: IA; MO; NE
- Centre County, Pennsylvania
- Cerro Gordo County, Iowa
- Chaffee County, Colorado
- Chambers County: AL; TX
- Champaign County: IL; OH
- Chariton County, Missouri
- Charles City County, Virginia
- Charles County, Maryland
- Charles Mix County, South Dakota
- Charleston County, South Carolina
- Charlevoix County, Michigan
- Charlotte County: FL; VA
- Charlton County, Georgia
- Chase County: KS; NE
- Chatham County: GA; NC
- Chattahoochee County, Georgia
- Chattooga County, Georgia
- Chautauqua County: KS; NY
- Chaves County, New Mexico
- Cheatham County, Tennessee
- Cheboygan County, Michigan
- Chelan County, Washington
- Chemung County, New York
- Chenango County, New York
- Cherokee County: AL; GA; IA; KS; NC; OK; SC; TX
- Cherry County, Nebraska
- Cheshire County, New Hampshire
- Chester County: PA; SC; TN
- Chesterfield County: SC; VA
- Cheyenne County: CO; KS; NE
- Chickasaw County: IA; MS
- Chicot County, Arkansas
- Childress County, Texas
- Chilton County, Alabama
- Chippewa County: MI; MN; WI
- Chisago County, Minnesota
- Chittenden County, Vermont
- Choctaw County: AL; MS; OK
- Chouteau County, Montana
- Chowan County, North Carolina
- Christian County: IL; KY; MO
- Churchill County, Nevada
- Cibola County, New Mexico
- Cimarron County, Oklahoma
- Citrus County, Florida
- Clackamas County, Oregon
- Claiborne County: MS; TN
- Claiborne Parish, Louisiana
- Clallam County, Washington
- Clare County, Michigan
- Clarendon County, South Carolina
- Clarion County, Pennsylvania
- Clark County: AR; ID; IL; IN; KS; KY; MO; NV; OH; SD; WA; WI
- Clarke County: AL; GA; IA; MS; VA
- Clatsop County, Oregon
- Clay County: AL; AR; FL; GA; IL; IN; IA; KS; KY; MN; MS; MO; NE; NC; SD; TN; TX; WV
- Clayton County: GA; IA
- Clear Creek County, Colorado
- Clearfield County, Pennsylvania
- Clearwater County: ID; MN
- Cleburne County: AL; AR
- Clermont County, Ohio
- Cleveland County: AR; NC; OK
- Clinch County, Georgia
- Clinton County: IL; IN; IA; KY; MI; MO; NY; OH; PA
- Cloud County, Kansas
- Coahoma County, Mississippi
- Coal County, Oklahoma
- Cobb County, Georgia
- Cochise County, Arizona
- Cochran County, Texas
- Cocke County, Tennessee
- Coconino County, Arizona
- Codington County, South Dakota
- Coffee County: AL; GA; TN
- Coffey County, Kansas
- Coke County, Texas
- Colbert County, Alabama
- Cole County, Missouri
- Coleman County, Texas
- Coles County, Illinois
- Colfax County: NE; NM
- Colleton County, South Carolina
- Collier County, Florida
- Collin County, Texas
- Collingsworth County, Texas
- Colorado County, Texas
- Colquitt County, Georgia
- Columbia County: AR; FL; GA; NY; OR; PA; WA; WI
- Columbiana County, Ohio
- Columbus County, North Carolina
- Colusa County, California
- Comal County, Texas
- Comanche County: KS; OK; TX
- Concho County, Texas
- Concordia Parish, Louisiana
- Conecuh County, Alabama
- Conejos County, Colorado
- Contra Costa County, California
- Converse County, Wyoming
- Conway County, Arkansas
- Cook County: GA; IL; MN
- Cooke County, Texas
- Cooper County, Missouri
- Coos County, Oregon
- Coos County, New Hampshire
- Coosa County, Alabama
- Copiah County, Mississippi
- 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: AL; MS
- Coweta County, Georgia
- Cowley County, Kansas
- Cowlitz County, Washington
- Craig County: OK; VA
- Craighead County, Arkansas
- Crane County, Texas
- Craven County, North Carolina
- Crawford County: AR; GA; IL; IN; IA; KS; MI; MO; OH; PA; WI
- Creek County, Oklahoma
- Crenshaw County, Alabama
- Crisp County, Georgia
- Crittenden County: AR; KY
- Crockett County: TN; TX
- Crook County: OR; WY
- Crosby County, Texas
- Cross County, Arkansas
- Crow Wing County, Minnesota
- Crowley County, Colorado
- Culberson County, Texas
- Cullman County, Alabama
- Culpeper County, Virginia
- Cumberland County: IL; KY; ME; NJ; NC; PA; TN; VA
- Cuming County, Nebraska
- Currituck County, North Carolina
- Curry County: NM; OR
- Custer County: CO; ID; MT; NE; OK; SD
- Cuyahoga County, Ohio
D[]
- Dade County: GA; MO; (FL)
- Daggett County, Utah
- Dakota County: MN; NE
- Dale County, Alabama
- Dallam County, Texas
- Dallas County: AL; AR; IA; MO; TX
- Dane County, Wisconsin
- Daniels County, Montana
- Dare County, North Carolina
- Darke County, Ohio
- Darlington County, South Carolina
- Dauphin County, Pennsylvania
- Davidson County: NC; TN
- Davie County, North Carolina
- Daviess County: IN; KY; MO
- Davis County: IA; UT
- Davison County, South Dakota
- Dawes County, Nebraska
- Dawson County: GA; MT; NE; TX
- Day County, South Dakota
- De Baca County, New Mexico
- DeKalb County: AL; GA; IL; IN; MO; TN
- De Soto Parish, Louisiana
- DeSoto County: FL; MS
- De Witt County, Illinois
- DeWitt County, Texas
- Deaf Smith County, Texas
- Dearborn County, Indiana
- Decatur County: GA; IN; IA; KS; TN
- Deer Lodge County, Montana
- Defiance County, Ohio
- Del Norte County, California
- Delaware County: IN; IA; NY; OH; OK; PA
- Delta County: CO; MI; TX
- Denali Borough, Alaska
- Dent County, Missouri
- Denton County, Texas
- City-County of Denver, Colorado
- Des Moines County, Iowa
- Deschutes County, Oregon
- Desha County, Arkansas
- Deuel County: NE; SD
- Dewey County: OK; SD
- Dickens County, Texas
- Dickenson County, Virginia
- Dickey County, North Dakota
- Dickinson County: IA; KS; MI
- Dickson County, Tennessee
- Dillingham Census Area, Alaska
- Dillon County, South Carolina
- Dimmit County, Texas
- Dinwiddie County, Virginia
- Divide County, North Dakota
- Dixie County, Florida
- Dixon County, Nebraska
- Doddridge County, West Virginia
- Dodge County: GA; MN; NE; WI
- Dolores County, Colorado
- Doña Ana County, New Mexico
- Doniphan County, Kansas
- Donley County, Texas
- Dooly County, Georgia
- Door County, Wisconsin
- Dorchester County: MD; SC
- Dougherty County, Georgia
- Douglas County: CO; GA; IL; KS; MN; MO; NE; NV; OR; SD; WA; WI
- Drew County, Arkansas
- Du Page County, Illinois
- Dubois County, Indiana
- Dubuque County, Iowa
- Duchesne County, Utah
- Dukes County, Massachusetts
- Dundy County, Nebraska
- Dunklin County, Missouri
- Dunn County: ND; WI
- Duplin County, North Carolina
- Durham County, North Carolina
- Dutchess County, New York
- Duval County: FL; TX
- Dyer County, Tennessee
E[]
- Eagle County, Colorado
- Early County, Georgia
- East Baton Rouge Parish, Louisiana
- East Carroll Parish, Louisiana
- East Feliciana Parish, Louisiana
- Eastland County, Texas
- Eaton County, Michigan
- Eau Claire County, Wisconsin
- Echols County, Georgia
- Ector County, Texas
- Eddy County: NM; ND
- Edgar County, Illinois
- Edgecombe County, North Carolina
- Edgefield County, South Carolina
- Edmonson County, Kentucky
- Edmunds County, South Dakota
- Edwards County: IL; KS; TX
- Effingham County: GA; IL
- El Dorado County, California
- El Paso County: CO; TX
- Elbert County: CO; GA
- Elk County: KS; PA
- Elkhart County, Indiana
- Elko County, Nevada
- Elliott County, Kentucky
- Ellis County: KS; OK; TX
- Ellsworth County, Kansas
- Elmore County: AL; ID
- Emanuel County, Georgia
- Emery County, Utah
- Emmet County: IA; MI
- Emmons County, North Dakota
- Erath County, Texas
- Erie County: NY; OH; PA
- Escambia County: AL; FL
- Esmeralda County, Nevada
- Essex County: MA; NJ; NY; VT; VA
- 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: CT; OH; SC
- Fall River County, South Dakota
- Fallon County, Montana
- Falls County, Texas
- Fannin County: GA; TX
- Faribault County, Minnesota
- Faulk County, South Dakota
- Faulkner County, Arkansas
- Fauquier County, Virginia
- Fayette County: AL; GA; IL; IN; IA; KY; OH; PA; TN; TX; WV
- Fentress County, Tennessee
- Fergus County, Montana
- Ferry County, Washington
- Fillmore County: MN; NE
- Finney County, Kansas
- Fisher County, Texas
- Flagler County, Florida
- Flathead County, Montana
- Fleming County, Kentucky
- Florence County: SC; WI
- Floyd County: GA; IN; IA; KY; TX; VA
- Fluvanna County, Virginia
- Foard County, Texas
- Fond du Lac County, Wisconsin
- Ford County: IL; KS
- Forest County: PA; WI
- Forrest County, Mississippi
- Forsyth County: GA; NC
- Fort Bend County, Texas
- Foster County, North Dakota
- Fountain County, Indiana
- Franklin County: AL; AR; FL; GA; ID; IL; IN; IA; KS; KY; ME; MA; MS; MO; NE; NY; NC; OH; PA; TN; TX; VT; VA; WA
- Franklin Parish, Louisiana
- Frederick County: MD; VA
- Freeborn County, Minnesota
- Freestone County, Texas
- Fremont County: CO; ID; IA; WY
- Fresno County, California
- Frio County, Texas
- Frontier County, Nebraska
- Fulton County: AR; GA; IL; IN; KY; NY; OH; PA
- Furnas County, Nebraska
G[]
- Gadsden County, Florida
- Gage County, Nebraska
- Gaines County, Texas
- Gallatin County: IL; KY; MT
- Gallia County, Ohio
- Galveston County, Texas
- Garden County, Nebraska
- Garfield County: CO; MT; NE; OK; UT; WA
- 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: MI; NY
- Geneva County, Alabama
- Gentry County, Missouri
- George County, Mississippi
- Georgetown County, South Carolina
- Gibson County: IN; TN
- Gila County, Arizona
- Gilchrist County, Florida
- Giles County: TN; VA
- Gillespie County, Texas
- Gilliam County, Oregon
- Gilmer County: GA; WV
- Gilpin County, Colorado
- Glacier County, Montana
- Glades County, Florida
- Gladwin County, Michigan
- Glascock County, Georgia
- Glasscock County, Texas
- Glenn County, California
- Gloucester County: NJ; VA
- Glynn County, Georgia
- Gogebic County, Michigan
- Golden Valley County: MT; ND
- 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: GA; OK
- Grafton County, New Hampshire
- Graham County: AZ; KS; NC
- Grainger County, Tennessee
- Grand County: CO; UT
- Grand Forks County, North Dakota
- Grand Isle County, Vermont
- Grand Traverse County, Michigan
- Granite County, Montana
- Grant County: AR; IN; KS; KY; MN; NE; NM; ND; OK; OR; SD; WA; WV; WI
- Grant Parish, Louisiana
- Granville County, North Carolina
- Gratiot County, Michigan
- Graves County, Kentucky
- Gray County: KS; TX
- Grays Harbor County, Washington
- Grayson County: KY; TX; VA
- Greeley County: KS; NE
- Green County: KY; WI
- Green Lake County, Wisconsin
- Greenbrier County, West Virginia
- Greene County: AL; AR; GA; IL; IN; IA; MS; MO; NY; NC; OH; PA; TN; VA
- Greenlee County, Arizona
- Greensville County, Virginia
- Greenup County, Kentucky
- Greenville County, South Carolina
- Greenwood County: KS; SC
- Greer County, Oklahoma
- Gregg County, Texas
- Gregory County, South Dakota
- Grenada County, Mississippi
- Griggs County, North Dakota
- Grimes County, Texas
- Grundy County: IL; IA; MO; TN
- Guadalupe County: NM; TX
- Guernsey County, Ohio
- Guilford County, North Carolina
- Gulf County, Florida
- Gunnison County, Colorado
- Guthrie County, Iowa
- Gwinnett County, Georgia
H[]
- Haakon County, South Dakota
- Habersham County, Georgia
- Haines Borough, Alaska
- Hale County: AL; TX
- Halifax County: NC; VA
- Hall County: GA; NE; TX
- Hamblen County, Tennessee
- Hamilton County: FL; IL; IN; IA; KS; NE; NY; OH; TN; TX
- Hamlin County, South Dakota
- Hampden County, Massachusetts
- Hampshire County: MA; WV
- Hampton County, South Carolina
- Hancock County: GA; IL; IN; IA; KY; ME; MS; OH; TN; WV
- Hand County, South Dakota
- Hanover County, Virginia
- Hansford County, Texas
- Hanson County, South Dakota
- Haralson County, Georgia
- Hardee County, Florida
- Hardeman County: TN; TX
- Hardin County: IL; IA; KY; OH; TN; TX
- Harding County: NM; SD
- Hardy County, West Virginia
- Harford County, Maryland
- Harlan County: KY; NE
- Harmon County, Oklahoma
- Harnett County, North Carolina
- Harney County, Oregon
- Harper County: KS; OK
- Harris County: GA; TX
- Harrison County: IN; IA; KY; MS; MO; OH; TX; WV
- Hart County: GA; KY
- Hartford County, Connecticut
- Hartley County, Texas
- Harvey County, Kansas
- Haskell County: KS; OK; TX
- Hawai'i County, Hawai'i
- Hawkins County, Tennessee
- Hayes County, Nebraska
- Hays County, Texas
- Haywood County: NC; TN
- Heard County, Georgia
- Hemphill County, Texas
- Hempstead County, Arkansas
- Henderson County: IL; KY; NC; TN; TX
- Hendricks County, Indiana
- Hendry County, Florida
- Hennepin County, Minnesota
- Henrico County, Virginia
- Henry County: AL; GA; IL; IN; IA; KY; MO; OH; TN; VA
- Herkimer County, New York
- Hernando County, Florida
- Hertford County, North Carolina
- Hettinger County, North Dakota
- Hickman County: KY; TN
- Hickory County, Missouri
- Hidalgo County: NM; TX
- Highland County: OH; VA
- Highlands County, Florida
- Hill County: MT; TX
- Hillsborough County: FL; NH
- 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: FL; MS; OH
- Holt County: MO; NE
- City and County of Honolulu, Hawai'i
- Hood County, Texas
- Hood River County, Oregon
- Hooker County, Nebraska
- Hopkins County: KY; TX
- Horry County, South Carolina
- Hot Spring County, Arkansas
- Hot Springs County, Wyoming
- Houghton County, Michigan
- Houston County: AL; GA; MN; TN; TX
- Howard County: AR; IN; IA; MD; MO; NE; TX
- Howell County, Missouri
- Hubbard County, Minnesota
- Hudson County, New Jersey
- Hudspeth County, Texas
- Huerfano County, Colorado
- Hughes County: OK; SD
- Humboldt County: CA; IA; NV
- Humphreys County: MS; TN
- Hunt County, Texas
- Hunterdon County, New Jersey
- Huntingdon County, Pennsylvania
- Huntington County, Indiana
- Huron County: MI; OH
- Hutchinson County: SD; TX
- Hyde County: NC; SD
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: IA; WI
- Iredell County, North Carolina
- Irion County, Texas
- Iron County: MI; MO; UT; WI
- Iroquois County, Illinois
- Irwin County, Georgia
- Isabella County, Michigan
- Isanti County, Minnesota
- Island County, Washington
- Isle of Wight County, Virginia
- Issaquena County, Mississippi
- Itasca County, Minnesota
- Itawamba County, Mississippi
- Izard County, Arkansas
J[]
- Jack County, Texas
- Jackson County: AL; AR; CO; FL; GA; IL; IN; IA; KS; KY; MI; MN; MS; MO; NC; OH; OK; OR; SD; TN; TX; WV; WI
- Jackson Parish, Louisiana
- James City County, Virginia
- Jasper County: GA; IL; IN; IA; MS; MO; SC; TX
- Jay County, Indiana
- Jeff Davis County: GA; TX
- Jefferson County: AL; AR; CO; FL; GA; ID; IL; IN; IA; KS; KY; MS; MO; MT; NE; NY; OH; OK; OR; PA; TN; TX; WA; WV; WI
- 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: AR; GA; IL; IN; IA; KS; KY; MO; NE; TN; TX; WY
- Johnston County: NC; OK
- Jones County: GA; IA; MS; NC; SD; TX
- Josephine County, Oregon
- Juab County, Utah
- Judith Basin County, Montana
- Juneau County, Wisconsin
- Juneau City and Borough, Alaska
- Juniata County, Pennsylvania
K[]
- Kalamazoo County, Michigan
- Kalawao County, Hawai'i
- Kalkaska County, Michigan
- Kanabec County, Minnesota
- Kanawha County, West Virginia
- Kandiyohi County, Minnesota
- Kane County: IL; UT
- Kankakee County, Illinois
- Karnes County, Texas
- Kaua'i County, Hawai'i
- Kaufman County, Texas
- Kay County, Oklahoma
- Kearney County, Nebraska
- Kearny County, Kansas
- Keith County, Nebraska
- Kemper County, Mississippi
- Kenai Peninsula Borough, Alaska
- Kendall County: IL; TX
- Kenedy County, Texas
- Kennebec County, Maine
- Kenosha County, Wisconsin
- Kent County: DE; MD; MI; RI; TX
- 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: TX; WA
- King George County, Virginia
- King William County, Virginia
- King and Queen County, Virginia
- Kingfisher County, Oklahoma
- Kingman County, Kansas
- Kings County: CA; NY
- Kingsbury County, South Dakota
- Kinney County, Texas
- Kiowa County: CO; KS; OK
- 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: IL; IN; KY; ME; MO; NE; OH; TN; TX
- Kodiak Island Borough, Alaska
- Koochiching County, Minnesota
- Kootenai County, Idaho
- Kosciusko County, Indiana
- Kossuth County, Iowa
L[]
- La Crosse County, Wisconsin
- LaMoure County, North Dakota
- La Paz County, Arizona
- La Plata County, Colorado
- LaPorte County, Indiana
- LaSalle County, Illinois
- La Salle County, Texas
- La Salle Parish, Louisiana
- Labette County, Kansas
- Lac qui Parle County, Minnesota
- Lackawanna County, Pennsylvania
- Laclede County, Missouri
- Lafayette County: AR; FL; MS; MO; WI
- Lafayette Parish, Louisiana
- Lafourche Parish, Louisiana
- LaGrange County, Indiana
- Lake County: CA; CO; FL; IL; IN; MI; MN; MT; OH; OR; SD; TN
- Lake and Peninsula Borough, Alaska
- Lake of the Woods County, Minnesota
- Lamar County: AL; GA; MS; TX
- Lamb County, Texas
- Lamoille County, Vermont
- Lampasas County, Texas
- Lancaster County: NE; PA; SC; VA
- Lander County, Nevada
- Lane County: KS; OR
- Langlade County, Wisconsin
- Lanier County, Georgia
- Lapeer County, Michigan
- Laramie County, Wyoming
- Larimer County, Colorado
- LaRue County, Kentucky
- Las Animas County, Colorado
- Lassen County, California
- Latah County, Idaho
- Latimer County, Oklahoma
- Lauderdale County: AL; MS; TN
- Laurel County, Kentucky
- Laurens County: GA; SC
- Lavaca County, Texas
- Lawrence County: AL; AR; IL; IN; KY; MS; MO; OH; PA; SD; TN
- Le Flore County, Oklahoma
- Le Sueur County, Minnesota
- Lea County, New Mexico
- Leake County, Mississippi
- Leavenworth County, Kansas
- Lebanon County, Pennsylvania
- Lee County: AL; AR; FL; GA; IL; IA; KY; MS; NC; SC; TX; VA
- Leelanau County, Michigan
- Leflore County, Mississippi
- Lehigh County, Pennsylvania
- Lemhi County, Idaho
- Lenawee County, Michigan
- Lenoir County, North Carolina
- Leon County: FL; TX
- Leslie County, Kentucky
- Letcher County, Kentucky
- Levy County, Florida
- Lewis County: ID; KY; MO; NY; TN; WA; WV
- Lewis and Clark County, Montana
- Lexington County, South Carolina
- Liberty County: FL; GA; MT; TX
- Licking County, Ohio
- Limestone County: AL; TX
- Lincoln County: AR; CO; GA; ID; KS; KY; ME; MN; MS; MO; MT; NE; NV; NM; NC; OK; OR; SD; TN; WA; WV; WI; WY
- Lincoln Parish, Louisiana
- Linn County: IA; KS; MO; OR
- Lipscomb County, Texas
- Litchfield County, Connecticut
- Little River County, Arkansas
- Live Oak County, Texas
- Livingston County: IL; KY; MI; MO; NY
- Livingston Parish, Louisiana
- Llano County, Texas
- Logan County: AR; CO; IL; KS; KY; NE; ND; OH; OK; WV
- 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: IA; VA
- Loup County, Nebraska
- Love County, Oklahoma
- Loving County, Texas
- Lowndes County: AL; GA; MS
- Lubbock County, Texas
- Lucas County: IA; OH
- Luce County, Michigan
- Lumpkin County, Georgia
- Luna County, New Mexico
- Lunenburg County, Virginia
- Luzerne County, Pennsylvania
- Lycoming County, Pennsylvania
- Lyman County, South Dakota
- Lynn County, Texas
- Lyon County: IA; KS; KY; MN; NV
M[]
- Mackinac County, Michigan
- Macomb County, Michigan
- Macon County: AL; GA; IL; MO; NC; TN
- Macoupin County, Illinois
- Madera County, California
- Madison County: AL; AR; FL; GA; ID; IL; IN; IA; KY; MS; MO; MT; NE; NY; NC; OH; TN; TX; VA
- Madison Parish, Louisiana
- Magoffin County, Kentucky
- Mahaska County, Iowa
- Mahnomen County, Minnesota
- Mahoning County, Ohio
- Major County, Oklahoma
- Malheur County, Oregon
- Manatee County, Florida
- Manistee County, Michigan
- Manitowoc County, Wisconsin
- Marathon County, Wisconsin
- Marengo County, Alabama
- Maricopa County, Arizona
- Maries County, Missouri
- Marin County, California
- Marinette County, Wisconsin
- Marion County: AL; AR; FL; GA; IL; IN; IA; KS; KY; MS; MO; OH; OR; SC; TN; TX; WV
- Mariposa County, California
- Marlboro County, South Carolina
- Marquette County: MI; WI
- Marshall County: AL; IL; IN; IA; KS; KY; MN; MS; OK; SD; TN; WV
- Martin County: FL; IN; KY; MN; NC; TX
- Mason County: IL; KY; MI; TX; WA; WV
- Massac County, Illinois
- Matagorda County, Texas
- Matanuska-Susitna Borough, Alaska
- Mathews County, Virginia
- County of Maui, Hawai'i
- Maury County, Tennessee
- Maverick County, Texas
- Mayes County, Oklahoma
- McClain County, Oklahoma
- McCone County, Montana
- McCook County, South Dakota
- McCormick County, South Carolina
- McCracken County, Kentucky
- McCreary County, Kentucky
- McCulloch County, Texas
- McCurtain County, Oklahoma
- McDonald County, Missouri
- McDonough County, Illinois
- McDowell County: NC; WV
- McDuffie County, Georgia
- McHenry County: IL; ND
- McIntosh County: GA; ND; OK
- McKean County, Pennsylvania
- McKenzie County, North Dakota
- McKinley County, New Mexico
- McLean County: IL; KY; ND
- McLennan County, Texas
- McLeod County, Minnesota
- McMinn County, Tennessee
- McMullen County, Texas
- McNairy County, Tennessee
- McPherson County: KS; NE; SD
- Meade County: KS; KY; SD
- Meagher County, Montana
- Mecklenburg County: NC; VA
- Mecosta County, Michigan
- Medina County: OH; TX
- Meeker County, Minnesota
- Meigs County: OH; TN
- Mellette County, South Dakota
- Menard County: IL; TX
- Mendocino County, California
- Menifee County, Kentucky
- Menominee County: MI; WI
- Merced County, California
- Mercer County: IL; KY; MO; NJ; ND; OH; PA; WV
- Meriwether County, Georgia
- Merrick County, Nebraska
- Merrimack County, New Hampshire
- Mesa County, Colorado
- Metcalfe County, Kentucky
- Miami County: IN; KS; OH
- Miami-Dade County, Florida
- Middlesex County: CT; MA; NJ; VA
- Midland County: MI; TX
- Mifflin County, Pennsylvania
- Milam County, Texas
- Millard County, Utah
- Mille Lacs County, Minnesota
- Miller County: AR; GA; MO
- Mills County: IA; TX
- Milwaukee County, Wisconsin
- Miner County, South Dakota
- Mineral County: CO; MT; NV; WV
- Mingo County, West Virginia
- Minidoka County, Idaho
- Minnehaha County, South Dakota
- Missaukee County, Michigan
- Mississippi County: AR; MO
- Missoula County, Montana
- Mitchell County: GA; IA; KS; NC; TX
- Mobile County, Alabama
- Modoc County, California
- Moffat County, Colorado
- Mohave County, Arizona
- Moniteau County, Missouri
- Monmouth County, New Jersey
- Mono County, California
- Monona County, Iowa
- Monongalia County, West Virginia
- Monroe County: AL; AR; FL; GA; IL; IN; IA; KY; MI; MS; MO; NY; OH; PA; TN; WV; WI
- Montague County, Texas
- Montcalm County, Michigan
- Monterey County, California
- Montezuma County, Colorado
- Montgomery County: AL; AR; GA; IL; IN; IA; KS; KY; MD; MS; MO; NY; NC; OH; PA; TN; TX; VA
- Montmorency County, Michigan
- Montour County, Pennsylvania
- Montrose County, Colorado
- Moody County, South Dakota
- Moore County: NC; TN; TX
- Mora County, New Mexico
- Morehouse Parish, Louisiana
- Morgan County: AL; CO; GA; IL; IN; KY; MO; OH; TN; UT; WV
- Morrill County, Nebraska
- Morris County: KS; NJ; TX
- Morrison County, Minnesota
- Morrow County: OH; OR
- Morton County: KS; ND
- Motley County, Texas
- Moultrie County, Illinois
- Mountrail County, North Dakota
- Mower County, Minnesota
- Muhlenberg County, Kentucky
- Multnomah County, Oregon
- Murray County: GA; MN; OK
- Muscatine County, Iowa
- Muscogee County, Georgia
- Muskegon County, Michigan
- Muskingum County, Ohio
- Muskogee County, Oklahoma
- Musselshell County, Montana
N[]
- Nacogdoches County, Texas
- Nance County, Nebraska
- Nantucket County, Massachusetts
- Napa County, California
- Nash County, North Carolina
- Nassau County: FL; NY
- Natchitoches Parish, Louisiana
- Natrona County, Wyoming
- Navajo County, Arizona
- Navarro County, Texas
- Nelson County: KY; ND; VA
- Nemaha County: KS; NE
- Neosho County, Kansas
- Neshoba County, Mississippi
- Ness County, Kansas
- Nevada County: AR; CA
- 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: AR; GA; IN; MS; MO; TX
- Nez Perce County, Idaho
- Niagara County, New York
- Nicholas County: KY; WV
- Nicollet County, Minnesota
- Niobrara County, Wyoming
- Noble County: IN; OH; OK
- 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: NC; PA; VA
- Northumberland County: PA; VA
- 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: GA; SC
- Oconto County, Wisconsin
- Ogemaw County, Michigan
- Oglala Lakota County, South Dakota
- Ogle County, Illinois
- Oglethorpe County, Georgia
- Ohio County: IN; KY; WV
- Okaloosa County, Florida
- Okanogan County, Washington
- Okeechobee County, Florida
- Okfuskee County, Oklahoma
- Oklahoma County, Oklahoma
- Okmulgee County, Oklahoma
- Oktibbeha County, Mississippi
- Oldham County: KY; TX
- Oliver County, North Dakota
- Olmsted County, Minnesota
- Oneida County: ID; NY; WI
- Onondaga County, New York
- Onslow County, North Carolina
- Ontario County, New York
- Ontonagon County, Michigan
- Orange County: CA; FL; IN; NY; NC; TX; VT; VA
- Orangeburg County, South Carolina
- Oregon County, Missouri
- Orleans County: NY; VT
- Orleans Parish, Louisiana
- Osage County: KS; MO; OK
- Osborne County, Kansas
- Osceola County: FL; IA; MI
- Oscoda County, Michigan
- Oswego County, New York
- Otero County: CO; NM
- Otoe County, Nebraska
- Otsego County: MI; NY
- Ottawa County: KS; MI; OH; OK
- Otter Tail County, Minnesota
- Ouachita County, Arkansas
- Ouachita Parish, Louisiana
- Ouray County, Colorado
- Outagamie County, Wisconsin
- Overton County, Tennessee
- Owen County: IN; KY
- Owsley County, Kentucky
- Owyhee County, Idaho
- Oxford County, Maine
- Ozark County, Missouri
- Ozaukee County, Wisconsin
P[]
- Pacific County, Washington
- Page County: IA; VA
- Palm Beach County, Florida
- Palo Alto County, Iowa
- Palo Pinto County, Texas
- Pamlico County, North Carolina
- Panola County: MS; TX
- Park County: CO; MT; WY
- Parke County, Indiana
- Parker County, Texas
- Parmer County, Texas
- Pasco County, Florida
- Pasquotank County, North Carolina
- Passaic County, New Jersey
- Patrick County, Virginia
- Paulding County: GA; OH
- Pawnee County: KS; NE; OK
- 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: KY; WV
- Pennington County: MN; SD
- Penobscot County, Maine
- Peoria County, Illinois
- Pepin County, Wisconsin
- Perkins County: NE; SD
- Perquimans County, North Carolina
- Perry County: AL; AR; IL; IN; KY; MS; MO; OH; PA; TN
- Pershing County, Nevada
- Person County, North Carolina
- Petersburg Census Area, Alaska
- Petroleum County, Montana
- Pettis County, Missouri
- Phelps County: MO; NE
- Philadelphia County, Pennsylvania
- Phillips County: AR; CO; KS; MT
- Piatt County, Illinois
- Pickaway County, Ohio
- Pickens County: AL; GA; SC
- Pickett County, Tennessee
- Pierce County: GA; NE; ND; WA; WI
- Pike County: AL; AR; GA; IL; IN; KY; MS; MO; OH; PA
- 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: MO; NE; WY
- Pleasants County, West Virginia
- Plumas County, California
- Plymouth County: IA; MA
- Pocahontas County: IA; WV
- Poinsett County, Arkansas
- Pointe Coupee Parish, Louisiana
- Polk County: AR; FL; GA; IA; MN; MO; NE; NC; OR; TN; TX; WI
- Pondera County, Montana
- Pontotoc County: MS; OK
- Pope County: AR; IL; MN
- Portage County: OH; WI
- Porter County, Indiana
- Posey County, Indiana
- Pottawatomie County: KS; OK
- Pottawattamie County, Iowa
- Potter County: PA; SD; TX
- Powder River County, Montana
- Powell County: KY; MT
- Power County, Idaho
- Poweshiek County, Iowa
- Powhatan County, Virginia
- Prairie County: AR; MT
- 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: AR; GA; IL; IN; KY; MO; VA
- Pushmataha County, Oklahoma
- Putnam County: FL; GA; IL; IN; MO; NY; OH; TN; WV
Q[]
- Quay County, New Mexico
- Queen Anne's County, Maryland
- Queens County, New York
- Quitman County: GA; MS
R[]
- Rabun County, Georgia
- Racine County, Wisconsin
- Rains County, Texas
- Raleigh County, West Virginia
- Ralls County, Missouri
- Ramsey County: MN; ND
- Randall County, Texas
- Randolph County: AL; AR; GA; IL; IN; MO; NC; WV
- 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: MN; ND
- Republic County, Kansas
- Reynolds County, Missouri
- Rhea County, Tennessee
- Rice County: KS; MN
- Rich County, Utah
- Richardson County, Nebraska
- Richland County: IL; MT; ND; OH; SC; WI
- Richland Parish, Louisiana
- Richmond County: GA; NY; NC; VA
- Riley County, Kansas
- Ringgold County, Iowa
- Rio Arriba County, New Mexico
- Rio Blanco County, Colorado
- Rio Grande County, Colorado
- Ripley County: IN; MO
- Ritchie County, West Virginia
- Riverside County, California
- Roane County: TN; WV
- Roanoke County, Virginia
- Roberts County: SD; TX
- Robertson County: KY; TN; TX
- Robeson County, North Carolina
- Rock County: MN; NE; WI
- Rock Island County, Illinois
- Rockbridge County, Virginia
- Rockcastle County, Kentucky
- Rockdale County, Georgia
- Rockingham County: NH; NC; VA
- Rockland County, New York
- Rockwall County, Texas
- Roger Mills County, Oklahoma
- Rogers County, Oklahoma
- Rolette County, North Dakota
- Rooks County, Kansas
- Roosevelt County: MT; NM
- Roscommon County, Michigan
- Roseau County, Minnesota
- Rosebud County, Montana
- Ross County, Ohio
- Routt County, Colorado
- Rowan County: KY; NC
- Runnels County, Texas
- Rush County: IN; KS
- Rusk County: TX; WI
- Russell County: AL; KS; KY; VA
- Rutherford County: NC; TN
- Rutland County, Vermont
S[]
- Sabine County, Texas
- Sabine Parish, Louisiana
- Sac County, Iowa
- Sacramento County, California
- Sagadahoc County, Maine
- Saginaw County, Michigan
- Saguache County, Colorado
- Saint Helena Parish, Louisiana
- Sainte Genevieve County, Missouri
- Salem County, New Jersey
- Saline County: AR; IL; KS; MO; NE
- 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 Jacinto County, Texas
- San Joaquin County, California
- San Juan County: CO; NM; UT; WA
- San Luis Obispo County, California
- San Mateo County, California
- San Miguel County: CO; NM
- San Patricio County, Texas
- San Saba County, Texas
- Sanborn County, South Dakota
- Sanders County, Montana
- Sandoval County, New Mexico
- Sandusky County, Ohio
- Sangamon County, Illinois
- Sanilac County, Michigan
- Sanpete County, Utah
- Santa Barbara County, California
- Santa Clara County, California
- Santa Cruz County: AZ; CA
- Santa Fe County, New Mexico
- Santa Rosa County, Florida
- Sarasota County, Florida
- Saratoga County, New York
- Sargent County, North Dakota
- Sarpy County, Nebraska
- Sauk County, Wisconsin
- Saunders County, Nebraska
- Sawyer County, Wisconsin
- Schenectady County, New York
- Schleicher County, Texas
- Schley County, Georgia
- Schoharie County, New York
- Schoolcraft County, Michigan
- Schuyler County: IL; MO; NY
- Schuylkill County, Pennsylvania
- Scioto County, Ohio
- Scotland County: MO; NC
- Scott County: AR; IL; IN; IA; KS; KY; MN; MS; MO; TN; VA
- Scotts Bluff County, Nebraska
- Screven County, Georgia
- Scurry County, Texas
- Searcy County, Arkansas
- Sebastian County, Arkansas
- Sedgwick County: CO; KS
- Seminole County: FL; GA; OK
- Seneca County: NY; OH
- Sequatchie County, Tennessee
- Sequoyah County, Oklahoma
- Sevier County: AR; TN; UT
- Seward County: KS; NE
- 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: AL; IL; IN; IA; KY; MO; OH; TN; TX
- Shenandoah County, Virginia
- Sherburne County, Minnesota
- Sheridan County: KS; MT; NE; ND; WY
- Sherman County: KS; NE; OR; TX
- Shiawassee County, Michigan
- Shoshone County, Idaho
- Sibley County, Minnesota
- Sierra County: CA; NM
- Silver Bow County, Montana
- Simpson County: KY; MS
- Sioux County: IA; NE; ND
- Siskiyou County, California
- City and Borough of Sitka, Alaska
- Skagit County, Washington
- Skagway Borough, Alaska
- Skagway-Hoonah-Angoon Census Area, Alaska
- Skamania County, Washington
- Slope County, North Dakota
- Smith County: KS; MS; TN; TX
- Smyth County, Virginia
- Snohomish County, Washington
- Snyder County, Pennsylvania
- Socorro County, New Mexico
- Solano County, California
- Somerset County: ME; MD; NJ; PA
- Somervell County, Texas
- Sonoma County, California
- Southampton County, Virginia
- Southeast Fairbanks Census Area, Alaska
- Spalding County, Georgia
- Spartanburg County, South Carolina
- Spencer County: IN; KY
- Spink County, South Dakota
- Spokane County, Washington
- Spotsylvania County, Virginia
- St. Bernard Parish, Louisiana
- St. Charles County, Missouri
- St. Charles Parish, Louisiana
- St. Clair County: AL; IL; MI; MO
- St. Croix County, Wisconsin
- St. Francis County, Arkansas
- St. Francois County, Missouri
- St. James Parish, Louisiana
- St. John the Baptist Parish, Louisiana
- St. Johns County, Florida
- St. Joseph County: IN; MI
- St. Landry Parish, Louisiana
- St. Lawrence County, New York
- St. Louis, Missouri (Independent city)
- St. Louis County: MN; MO
- St. Lucie County, Florida
- St. Martin Parish, Louisiana
- St. Mary Parish, Louisiana
- St. Mary's County, Maryland
- St. Tammany Parish, Louisiana
- Stafford County: KS; VA
- Stanislaus County, California
- Stanley County, South Dakota
- Stanly County, North Carolina
- Stanton County: KS; NE
- Stark County: IL; ND; OH
- Starke County, Indiana
- Starr County, Texas
- Stearns County, Minnesota
- Steele County: MN; ND
- Stephens County: GA; OK; TX
- Stephenson County, Illinois
- Sterling County, Texas
- Steuben County: IN; NY
- Stevens County: KS; MN; WA
- Stewart County: GA; TN
- Stillwater County, Montana
- Stoddard County, Missouri
- Stokes County, North Carolina
- Stone County: AR; MS; MO
- Stonewall County, Texas
- Storey County, Nevada
- Story County, Iowa
- Strafford County, New Hampshire
- Stutsman County, North Dakota
- Sublette County, Wyoming
- Suffolk County: MA; NY
- Sullivan County: IN; MO; NH; NY; PA; TN
- Sully County, South Dakota
- Summers County, West Virginia
- Summit County: CO; OH; UT
- Sumner County: KS; TN
- Sumter County: AL; FL; GA; SC
- Sunflower County, Mississippi
- Surry County: NC; VA
- Susquehanna County, Pennsylvania
- Sussex County: DE; NJ; VA
- Sutter County, California
- Sutton County, Texas
- Suwannee County, Florida
- Swain County, North Carolina
- Sweet Grass County, Montana
- Sweetwater County, Wyoming
- Swift County, Minnesota
- Swisher County, Texas
- Switzerland County, Indiana
T[]
- Talbot County: GA; MD
- 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: FL; GA; IA; KY; TX; WV; WI
- Tazewell County: IL; VA
- Tehama County, California
- Telfair County, Georgia
- Teller County, Colorado
- Tensas Parish, Louisiana
- Terrebonne Parish, Louisiana
- Terrell County: GA; TX
- Terry County, Texas
- Teton County: ID; MT; WY
- Texas County: MO; OK
- Thayer County, Nebraska
- Thomas County: GA; KS; NE
- Throckmorton County, Texas
- Thurston County: NE; WA
- Tift County, Georgia
- Tillamook County, Oregon
- Tillman County, Oklahoma
- Tioga County: NY; PA
- Tippah County, Mississippi
- Tippecanoe County, Indiana
- Tipton County: IN; TN
- Tishomingo County, Mississippi
- Titus County, Texas
- Todd County: KY; MN; SD
- 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: CA; TX
- Tripp County, South Dakota
- Troup County, Georgia
- Trousdale County, Tennessee
- Trumbull County, Ohio
- Tucker County, West Virginia
- Tulare County, California
- Tulsa County, Oklahoma
- Tunica County, Mississippi
- Tuolumne County, California
- Turner County: GA; SD
- Tuscaloosa County, Alabama
- Tuscarawas County, Ohio
- Tuscola County, Michigan
- Twiggs County, Georgia
- Twin Falls County, Idaho
- Tyler County: TX; WV
- Tyrrell County, North Carolina
U[]
- Uinta County, Wyoming
- Uintah County, Utah
- Ulster County, New York
- Umatilla County, Oregon
- Unicoi County, Tennessee
- Union County: AR; FL; GA; IL; IN; IA; KY; MS; NJ; NM; NC; OH; OR; PA; SC; SD; TN
- Union Parish, Louisiana
- Upshur County: TX; WV
- Upson County, Georgia
- Upton County, Texas
- Utah County, Utah
- Uvalde County, Texas
V[]
- Val Verde County, Texas
- Valdez–Cordova Census Area, Alaska
- Valencia County, New Mexico
- Valley County: ID; MT; NE
- Van Buren County: AR; IA; MI; TN
- Van Wert County, Ohio
- Van Zandt County, Texas
- Vance County, North Carolina
- Vanderburgh County, Indiana
- Venango County, Pennsylvania
- Ventura County, California
- Vermilion County, Illinois
- Vermilion Parish, Louisiana
- Vermillion County, Indiana
- Vernon County: MO; WI
- Vernon Parish, Louisiana
- Victoria County, Texas
- Vigo County, Indiana
- Vilas County, Wisconsin
- Vinton County, Ohio
- Volusia County, Florida
W[]
- Wabash County: IL; IN
- Wabasha County, Minnesota
- Wabaunsee County, Kansas
- Wade Hampton Census Area, Alaska
- Wadena County, Minnesota
- Wagoner County, Oklahoma
- Wahkiakum County, Washington
- Wake County, North Carolina
- Wakulla County, Florida
- Waldo County, Maine
- Walker County: AL; GA; TX
- Walla Walla County, Washington
- Wallace County, Kansas
- Waller County, Texas
- Wallowa County, Oregon
- Walsh County, North Dakota
- Walthall County, Mississippi
- Walton County: FL; GA
- Walworth County: SD; WI
- Wapello County, Iowa
- Ward County: ND; TX
- Ware County, Georgia
- Warren County: GA; IL; IN; IA; KY; MS; MO; NJ; NY; NC; OH; PA; TN; VA
- Warrick County, Indiana
- Wasatch County, Utah
- Wasco County, Oregon
- Waseca County, Minnesota
- Washakie County, Wyoming
- Washburn County, Wisconsin
- Washington County: AL; AR; CO; DC; FL; GA; ID; IL; IN; IA; KS; KY; ME; MD; MN; MS; MO; NE; NY; NC; OH; OK; OR; PA; RI; TN; TX; UT; VT; VA; WI
- 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: GA; IL; IN; IA; KY; MI; MS; MO; NE; NY; NC; OH; PA; TN; UT; WV
- Weakley County, Tennessee
- Webb County, Texas
- Weber County, Utah
- Webster County: GA; IA; KY; MS; MO; NE; WV
- Webster Parish, Louisiana
- Weld County, Colorado
- Wells County: IN; ND
- West Baton Rouge Parish, Louisiana
- West Carroll Parish, Louisiana
- West Feliciana Parish, Louisiana
- Westchester County, New York
- Westmoreland County: PA; VA
- Weston County, Wyoming
- Wetzel County, West Virginia
- Wexford County, Michigan
- Wharton County, Texas
- Whatcom County, Washington
- Wheatland County, Montana
- Wheeler County: GA; NE; OR; TX
- White County: AR; GA; IL; IN; TN
- White Pine County, Nevada
- Whiteside County, Illinois
- Whitfield County, Georgia
- Whitley County: IN; KY
- Whitman County, Washington
- Wibaux County, Montana
- Wichita County: KS; TX
- Wicomico County, Maryland
- Wilbarger County, Texas
- Wilcox County: AL; GA
- Wilkes County: GA; NC
- Wilkin County, Minnesota
- Wilkinson County: GA; MS
- Will County, Illinois
- Willacy County, Texas
- Williams County: ND; OH
- Williamsburg County, South Carolina
- Williamson County: IL; TN; TX
- Wilson County: KS; NC; TN; TX
- Windham County: CT; VT
- Windsor County, Vermont
- Winkler County, Texas
- Winn Parish, Louisiana
- Winnebago County: IL; IA; WI
- Winneshiek County, Iowa
- Winona County, Minnesota
- Winston County: AL; MS
- Wirt County, West Virginia
- Wise County: TX; VA
- Wolfe County, Kentucky
- Wood County: OH; TX; WV; WI
- Woodbury County, Iowa
- Woodford County: IL; KY
- Woodruff County, Arkansas
- Woods County, Oklahoma
- Woodson County, Kansas
- Woodward County, Oklahoma
- Worcester County: MD; MA
- Worth County: GA; IA; MO
- Wright County: IA; MN; MO
- Wyandot County, Ohio
- Wyandotte County, Kansas
- Wyoming County: NY; PA; WV
- Wythe County, Virginia
Y[]
- Yadkin County, North Carolina
- Yakima County, Washington
- Yakutat City and Borough, Alaska
- Yalobusha County, Mississippi
- Yamhill County, Oregon
- Yancey County, North Carolina
- Yankton County, South Dakota
- Yates County, New York
- Yavapai County, Arizona
- Yazoo County, Mississippi
- Yell County, Arkansas
- Yellow Medicine County, Minnesota
- Yellowstone County, Montana
- Yoakum County, Texas
- Yolo County, California
- York County: ME; NE; PA; SC; VA
- Young County, Texas
- Yuba County, California
- Yukon–Koyukuk Census Area, Alaska
- Yuma County: AZ; CO