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Most Populous 100 U.S. Counties

Name the counties of U.S. states that have the largest populations.
2019 U.S. Census estimates
Quiz by Angbo
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Last updated: April 26, 2021
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First submittedApril 17, 2021
Times taken61
Average score55.0%
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State
Population
County
California
10,039,107
Los Angeles
Illinois
5,150,233
Cook
Texas
4,713,325
Harris
Arizona
4,485,414
Maricopa
California
3,338,330
San Diego
California
3,175,692
Orange
Florida
2,716,940
Miami-Dade
Texas
2,635,516
Dallas
New York
2,559,903
Kings
California
2,470,546
Riverside
Nevada
2,266,715
Clark
New York
2,253,858
Queens
Washington
2,252,782
King
California
2,180,085
San Bernardino
Texas
2,102,515
Tarrant
Texas
2,003,554
Bexar
Florida
1,952,778
Broward
California
1,927,852
Santa Clara
Michigan
1,749,343
Wayne
California
1,671,329
Alameda
New York
1,628,706
New York
Massachusetts
1,611,699
Middlesex
Pennsylvania
1,584,064
Philadelphia
California
1,552,058
Sacramento
Florida
1,496,770
Palm Beach
New York
1,476,601
Suffolk
Florida
1,471,968
Hillsborough
New York
1,418,207
Bronx
Florida
1,393,452
Orange
New York
1,356,924
Nassau
Ohio
1,316,756
Franklin
Texas
1,273,954
Travis
Minnesota
1,265,843
Hennepin
Michigan
1,257,584
Oakland
Ohio
1,235,072
Cuyahoga
Pennsylvania
1,216,045
Allegheny
Utah
1,160,437
Salt Lake
California
1,153,526
Contra Costa
Virginia
1,147,532
Fairfax
North Carolina
1,111,761
Wake
North Carolina
1,110,356
Mecklenburg
Georgia
1,063,937
Fulton
Maryland
1,050,688
Montgomery
Arizona
1,047,279
Pima
Texas
1,034,730
Collin
California
999,101
Fresno
Missouri
994,205
St. Louis
Florida
974,996
Pinellas
Hawaii
974,563
Honolulu
New York
967,506
Westchester
State
Population
County
Indiana
964,582
Marion
Florida
957,755
Duval
Wisconsin
945,726
Milwaukee
Connecticut
943,331
Fairfield
Tennessee
937,166
Shelby
Georgia
936,250
Gwinnett
New Jersey
932,202
Bergen
Illinois
922,921
DuPage
New York
918,702
Erie
Maryland
909,327
Prince George's
Washington
904,980
Pierce
California
900,202
Kern
Connecticut
891,720
Hartford
Texas
887,207
Denton
California
881,549
San Francisco
Michigan
873,972
Macomb
Texas
868,707
Hidalgo
Connecticut
854,757
New Haven
California
846,006
Ventura
Texas
839,238
El Paso
Pennsylvania
830,915
Montgomery
Massachusetts
830,622
Worcester
Maryland
827,370
Baltimore
New Jersey
825,062
Middlesex
Washington
822,083
Snohomish
Ohio
817,473
Hamilton
Oregon
812,855
Multnomah
Texas
811,688
Fort Bend
Massachusetts
803,907
Suffolk
New Jersey
798,975
Essex
Oklahoma
797,434
Oklahoma
Massachusetts
789,034
Essex
Florida
770,577
Lee
Kentucky
776,757
Jefferson
California
766,573
San Mateo
California
762,148
San Joaquin
Georgia
760,141
Cobb
Georgia
759,257
DeKalb
New York
741,770
Monroe
Colorado
727,211
Denver
Florida
724,777
Polk
Colorado
720,403
El Paso
Massachusetts
706,775
Norfolk
---
705,749
DC
Missouri
703,011
Jackson
Illinois
696,535
Lake
Tennessee
694,144
Davidson
Illinois
690,743
Will
New Mexico
679,121
Bernalillo
New Jersey
672,391
Hudson
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