List of the main counties in the US

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Counties serve as vital administrative divisions within each state, often covering a mix of urban, suburban, and rural areas. They play a crucial role in local governance, public safety, and community services, acting as a bridge between state governments and municipalities.

Some of their responsibilities typically include law enforcement, judicial services, public health, infrastructure maintenance, land use planning, elections, tax collection, and records management. Counties also manage public works, social services, and sometimes education and libraries, ensuring the well-being and safety of their residents.

This is a directory of the major US counties and cities in each State. Whether you're planning a visit, conducting research, or simply curious about the diverse regions of this vast country, this page provides a list of the key counties that make up each state.
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Major counties in Alabama

Jefferson

Mobile

Madison

Baldwin

Tuscaloosa

Montgomery

Shelby

Lee

Morgan

Calhoun

Limestone

Etowah

St. Clair

Lauderdale

Elmore

Complete list of counties in Alabama

Major boroughs in Alaska

Aleutians East

Aleutians West

Anchorage

Bethel

Bristol Bay

Denali

Dillingham

Fairbanks North Star

Haines

Hoonah-Angoon

Juneau

Kenai Peninsula

Ketchikan Gateway

Kodiak Island

Lake and Peninsula

Complete list of boroughs in Alaska

Major districts in American Samoa

Eastern

Manu'a

Rose Island

Swains Island

Western

More information about the districts in American Samoa

Major counties in Arizona

Maricopa

Pima

Pinal

Yavapai

Mohave

Yuma

Coconino

Cochise

Navajo

Apache

Gila

Santa Cruz

Graham

La Paz

Greenlee

Complete list of counties in Arizona

Major counties in Arkansas

Pulaski

Benton

Washington

Sebastian

Faulkner

Saline

Craighead

Garland

White

Lonoke

Jefferson

Pope

Crawford

Greene

Baxter

Complete list of counties in Arkansas

Major counties in California

Los Angeles

San Diego

Orange

Riverside

San Bernardino

Santa Clara

Alameda

Sacramento

Contra Costa

Fresno

Kern

San Francisco

Ventura

San Joaquin

San Mateo

Complete list of counties in California

Major counties in Colorado

El Paso

Denver

Arapahoe

Jefferson

Adams

Douglas

Larimer

Boulder

Weld

Pueblo

Mesa

Garfield

Eagle

Montrose

Elbert

Complete list of counties in Colorado

Major wards in Columbia

District of Columbia

More information about the wards in Columbia

Major counties in Connecticut

Fairfield

Hartford

New Haven

New London

Litchfield

Middlesex

Tolland

Windham

More information about the counties in Connecticut

Major counties in Delaware

New Castle

Sussex

Kent

More information about the counties in Delaware

Major counties in Florida

Broward

Hillsborough

Palm Beach

Orange

Duval

Pinellas

Lee

Polk

Brevard

Pasco

Volusia

Seminole

Sarasota

Manatee

Alachua

Complete list of counties in Florida

Major counties in Georgia

Fulton

Gwinnett

Cobb

DeKalb

Chatham

Clayton

Cherokee

Forsyth

Henry

Richmond

Hall

Paulding

Columbia

Bibb

Clarke

Complete list of counties in Georgia

Major districts in Guam

Latte Heights

More information about the districts in Guam

Major counties in Hawaii

Honolulu

Hawaii

Maui

Kauai

More information about the counties in Hawaii

Major counties in Idaho

Ada

Canyon

Kootenai

Bonneville

Twin Falls

Bannock

Madison

Bonner

Bingham

Latah

Nez Perce

Elmore

Payette

Blaine

Jerome

Complete list of counties in Idaho

Major counties in Illinois

Cook

DuPage

Lake

Will

Kane

McHenry

Winnebago

Madison

St. Clair

Champaign

Sangamon

Peoria

McLean

Rock Island

Kankakee

Complete list of counties in Illinois

Major counties in Indiana

Marion

Lake

Allen

Hamilton

St. Joseph

Elkhart

Tippecanoe

Hendricks

Vanderburgh

Porter

Johnson

Monroe

Madison

Delaware

Bartholomew

Complete list of counties in Indiana

Major counties in Iowa

Polk

Linn

Scott

Johnson

Black Hawk

Woodbury

Story

Dubuque

Pottawattamie

Clinton

Muscatine

Cerro Gordo

Jasper

Marion

Buena Vista

Complete list of counties in Iowa

Major counties in Kansas

Johnson

Sedgwick

Shawnee

Wyandotte

Douglas

Leavenworth

Riley

Butler

Reno

Saline

Crawford

Finney

Cowley

Geary

Sumner

Complete list of counties in Kansas

Major counties in Kentucky

Jefferson

Fayette

Kenton

Boone

Warren

Hardin

Madison

Daviess

Campbell

Bullitt

Christian

Oldham

McCracken

Pulaski

Boyd

Complete list of counties in Kentucky

Major parishes in Louisiana

East Baton Rouge

Jefferson

Orleans

St. Tammany

Lafayette

Caddo

Calcasieu

Ouachita

Livingston

Ascension

Rapides

Bossier

Terrebonne

St. Charles

St. Bernard

Complete list of parishes in Louisiana

Major counties in Maine

Cumberland

York

Penobscot

Kennebec

Androscoggin

Aroostook

Oxford

Hancock

Somerset

Knox

Waldo

Sagadahoc

Lincoln

Washington

Franklin

Complete list of counties in Maine

Major counties in Maryland

Montgomery

Prince George's

Baltimore

Anne Arundel

Howard

Frederick

Harford

Carroll

Charles

Washington

St. Mary's

Cecil

Wicomico

Calvert

Allegany

Complete list of counties in Maryland

Major counties in Massachusetts

Middlesex

Worcester

Essex

Suffolk

Norfolk

Bristol

Plymouth

Hampden

Barnstable

Hampshire

Berkshire

Franklin

Dukes

Nantucket

More information about the counties in Massachusetts

Major counties in Michigan

Wayne

Oakland

Macomb

Kent

Genesee

Washtenaw

Ottawa

Ingham

Kalamazoo

Livingston

Saginaw

Muskegon

St. Clair

Jackson

Berrien

Complete list of counties in Michigan

Major counties in Minnesota

Hennepin

Ramsey

Dakota

Anoka

Washington

St. Louis

Olmsted

Stearns

Scott

Wright

Carver

Sherburne

Blue Earth

Clay

Otter Tail

Complete list of counties in Minnesota

Major counties in Mississippi

Hinds

Harrison

DeSoto

Rankin

Jackson

Madison

Lee

Lauderdale

Forrest

Jones

Lamar

Oktibbeha

Warren

Leflore

Adams

Complete list of counties in Mississippi

Major counties in Missouri

St. Louis

St. Louis

Jackson

St. Charles

Greene

Clay

Jefferson

Boone

Jasper

Platte

Cass

Franklin

Christian

Buchanan

St. Francois

Complete list of counties in Missouri

Major counties in Montana

Yellowstone

Gallatin

Missoula

Flathead

Cascade

Lewis and Clark

Ravalli

Silver Bow

Lake

Lincoln

Glacier

Custer

Roosevelt

Fergus

Beaverhead

Complete list of counties in Montana

Major counties in Nebraska

Douglas

Lancaster

Sarpy

Hall

Buffalo

Dodge

Madison

Scotts Bluff

Lincoln

Platte

Adams

Cass

Dawson

Washington

Seward

Complete list of counties in Nebraska

Major counties in Nevada

Clark

Washoe

Lyon

Carson City

Elko

Nye

Douglas

Churchill

Humboldt

White Pine

Lander

Lincoln

Mineral

Storey

Eureka

Complete list of counties in Nevada

Major counties in New Hampshire

Hillsborough

Rockingham

Merrimack

Strafford

Grafton

Cheshire

Belknap

Carroll

Sullivan

Coos

More information about the counties in New Hampshire

Major counties in New Jersey

Bergen

Middlesex

Essex

Hudson

Ocean

Monmouth

Union

Passaic

Camden

Morris

Burlington

Mercer

Somerset

Gloucester

Atlantic

Complete list of counties in New Jersey

Major counties in New Mexico

Bernalillo

Santa Fe

Sandoval

San Juan

Valencia

Lea

McKinley

Otero

Chaves

Eddy

Curry

Rio Arriba

Luna

Lincoln

Catron

Complete list of counties in New Mexico

Major counties in New York

Queens

Suffolk

Bronx

Nassau

Westchester

Erie

Monroe

Onondaga

Orange

Rockland

Albany

Dutchess

Allegany

Broome

Cattaraugus

Complete list of counties in New York

Major counties in North Carolina

Mecklenburg

Wake

Guilford

Forsyth

Durham

Cumberland

Buncombe

Union

Johnston

Cabarrus

Gaston

New Hanover

Alamance

Pitt

Rowan

Complete list of counties in North Carolina

Major counties in North Dakota

Cass

Burleigh

Grand Forks

Ward

Williams

Stark

Morton

Stutsman

Richland

McKenzie

Rolette

Ramsey

McLean

Mountrail

Hettinger

Complete list of counties in North Dakota

Major municipalities in Northern Mariana Islands

Northern Islands

Rota

Saipan

Tinian

More information about the municipalities in Northern Mariana Islands

Major counties in Ohio

Franklin

Cuyahoga

Hamilton

Montgomery

Summit

Lucas

Butler

Stark

Lorain

Warren

Delaware

Lake

Mahoning

Clermont

Medina

Complete list of counties in Ohio

Major counties in Oklahoma

Oklahoma

Tulsa

Cleveland

Canadian

Comanche

Rogers

Payne

Pottawatomie

Creek

Muskogee

Garfield

Grady

Washington

Carter

Adair

Complete list of counties in Oklahoma

Major counties in Oregon

Multnomah

Washington

Clackamas

Lane

Marion

Jackson

Deschutes

Linn

Douglas

Yamhill

Benton

Josephine

Polk

Coos

Columbia

Complete list of counties in Oregon

Major counties in Pennsylvania

Philadelphia

Allegheny

Montgomery

Bucks

Delaware

Lancaster

Chester

York

Berks

Lehigh

Westmoreland

Luzerne

Northampton

Dauphin

Erie

Complete list of counties in Pennsylvania

Major municipalities in Puerto Rico

Adjuntas

Aguada

Aguadilla

Aguas Buenas

Aibonito

Añasco

Arecibo

Arroyo

Barceloneta

Barranquitas

Bayamón

Cabo Rojo

Caguas

Camuy

Canóvanas

Complete list of municipalities in Puerto Rico

Major counties in Rhode Island

Providence

Kent

Washington

Newport

Bristol

More information about the counties in Rhode Island

Major counties in South Carolina

Greenville

Charleston

Richland

Horry

Spartanburg

Lexington

Berkeley

Anderson

Beaufort

Dorchester

Aiken

Florence

Pickens

Sumter

Orangeburg

Complete list of counties in South Carolina

Major counties in South Dakota

Minnehaha

Pennington

Lincoln

Brown

Brookings

Meade

Codington

Lawrence

Yankton

Davison

Hughes

Union

Clay

Roberts

Charles Mix

Complete list of counties in South Dakota

Major counties in Tennessee

Shelby

Davidson

Knox

Hamilton

Rutherford

Williamson

Montgomery

Sumner

Wilson

Sullivan

Blount

Washington

Maury

Madison

Anderson

Complete list of counties in Tennessee

Major counties in Texas

Harris

Dallas

Tarrant

Bexar

Travis

Collin

Denton

Fort Bend

Hidalgo

El Paso

Montgomery

Cameron

Brazoria

Bell

Anderson

Complete list of counties in Texas

Major districts in U.S. Virgin Islands

St. Croix

St. John

St. Thomas

More information about the districts in U.S. Virgin Islands

Major territories in United States Minor Outlying Islands

Baker Island

Howland Island

Jarvis Island

Johnston Atoll

Kingman Reef

Midway Islands

Navassa Island

Palmyra Atoll

Wake Island

More information about the territories in United States Minor Outlying Islands

Major counties in Utah

Salt Lake

Utah

Davis

Weber

Washington

Cache

Tooele

Iron

Box Elder

Summit

Wasatch

Uintah

Sanpete

Carbon

Duchesne

Complete list of counties in Utah

Major counties in Vermont

Chittenden

Washington

Rutland

Windsor

Franklin

Windham

Addison

Bennington

Caledonia

Orange

Orleans

Lamoille

Grand Isle

Essex

More information about the counties in Vermont

Major counties in Virginia

Fairfax

Prince William

Loudoun

Chesterfield

Henrico

Arlington

Stafford

Spotsylvania

Accomack

Albemarle

Alleghany

Amelia

Amherst

Appomattox

Augusta

Complete list of counties in Virginia

Major counties in Washington

King

Pierce

Snohomish

Spokane

Clark

Thurston

Kitsap

Yakima

Whatcom

Benton

Skagit

Cowlitz

Grant

Franklin

Grays Harbor

Complete list of counties in Washington

Major counties in West Virginia

Kanawha

Berkeley

Monongalia

Cabell

Wood

Raleigh

Harrison

Jefferson

Mercer

Putnam

Marion

Fayette

Hancock

Mineral

Barbour

Complete list of counties in West Virginia

Major counties in Wisconsin

Milwaukee

Dane

Waukesha

Brown

Racine

Outagamie

Winnebago

Kenosha

Rock

Marathon

Washington

La Crosse

Sheboygan

Walworth

Ozaukee

Complete list of counties in Wisconsin

Major counties in Wyoming

Laramie

Natrona

Campbell

Sweetwater

Fremont

Albany

Sheridan

Park

Teton

Uinta

Carbon

Converse

Goshen

Sublette

Hot Springs

Complete list of counties in Wyoming

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