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Most Populous County in Each State

Name the most populous county in each state.
Based on the 2020 census.
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FNWY4life
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Last updated: October 19, 2025
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First submittedOctober 19, 2025
Times taken9
Average score54.0%
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State
Population
County
Alabama
674,717
Jefferson
Alaska
290,893
Anchorage
Arizona
4,445,059
Maricopa
Arkansas
399,274
Pulaski
California
9,992,813
Los Angeles
Colorado
732,384
El Paso
Connecticut
959,768
Fairfield
Delaware
570,918
New Castle
Florida
2,695,685
Miami-Dade
Georgia
1,069,394
Fulton
Hawaii
1,012,399
Honolulu
Idaho
498,278
Ada
Illinois
5,263,608
Cook
Indiana
976,659
Marion
Iowa
493,022
Polk
Kansas
611,149
Johnson
Kentucky
782,845
Jefferson
Louisiana
455,899
East Baton Rouge
Maine
303,585
Cumberland
Maryland
1,060,904
Montgomery
Massachusetts
1,628,235
Middlesex
Michigan
1,789,586
Wayne
Minnesota
1,281,649
Hennepin
Mississippi
226,765
Hinds
Missouri
1,003,130
St. Louis
Montana
164,875
Yellowstone
Nebraska
585,431
Douglas
Nevada
2,274,887
Clark
New Hampshire
422,913
Hillsborough
New Jersey
953,690
Bergen
New Mexico
676,853
Bernalillo
New York
2,718,447
Kings
North Carolina
1,130,483
Wake
North Dakota
184,876
Cass
Ohio
1,324,441
Franklin
Oklahoma
798,241
Oklahoma
Oregon
816,514
Multnomah
Pennsylvania
1,600,684
Philadelphia
Rhode Island
659,963
Providence
South Carolina
527,249
Greenville
South Dakota
197,695
Minnehaha
Tennessee
929,763
Shelby
Texas
4,734,792
Harris
Utah
1,186,983
Salt Lake
Vermont
169,729
Chittenden
Virginia
1,148,627
Fairfax
Washington
2,274,282
King
West Virginia
172,687
Kanawha
Wisconsin
938,550
Milwaukee
Wyoming
101,390
Laramie
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