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300 Biggest Counties in the United States

Can you guess the 300 most populous counties in the United States?
2020 Census Numbers
Quiz by coventtry
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Last updated: October 22, 2021
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First submittedOctober 21, 2021
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Population
State
Answer
10,014,009
California
Los Angeles
5,275,541
Illinois
Cook
4,731,145
Texas
Harris
4,420,568
Arizona
Maricopa
3,298,634
California
San Diego
3,186,989
California
Orange
2,736,074
New York
Kings
2,701,767
Florida
Miami-Dade
2,613,539
Texas
Dallas
2,418,485
California
Riverside
2,405,464
New York
Queens
2,269,675
Washington
King
2,265,461
Nevada
Clark
2,181,654
California
San Bernardino
2,110,640
Texas
Tarrant
2,009,324
Texas
Bexar
1,944,375
Florida
Broward
1,936,259
California
Santa Clara
1,793,561
Michigan
Wayne
1,694,251
New York
New York
1,682,353
California
Alameda
1,632,002
Massachusetts
Middlesex
1,603,797
Pennsylvania
Philadelphia
1,585,055
California
Sacramento
1,525,920
New York
Suffolk
1,492,191
Florida
Palm Beach
1,472,654
New York
Bronx
1,459,762
Florida
Hillsborough
1,429,908
Florida
Orange
1,395,774
New York
Nassau
1,323,807
Ohio
Franklin
1,290,188
Texas
Travis
1,281,565
Minnesota
Hennepin
1,274,395
Michigan
Oakland
1,264,817
Ohio
Cuyahoga
1,250,578
Pennsylvania
Allegheny
1,185,238
Utah
Salt Lake
1,165,927
California
Contra Costa
1,150,309
Virginia
Fairfax
1,129,410
North Carolina
Wake
1,115,482
North Carolina
Mecklenburg
1,066,710
Georgia
Fulton
1,064,465
Texas
Collin
1,062,061
Maryland
Montgomery
1,043,433
Arizona
Pima
1,016,508
Hawaii
Honolulu
1,008,654
California
Fresno
1,004,457
New York
Westchester
1,004,125
Missouri
St. Louis
995,567
Florida
Duval
977,203
Indiana
Marion
967,201
Maryland
Prince George's
959,107
Florida
Pinellas
957,419
Connecticut
Fairfield
957,062
Georgia
Gwinnett
955,732
New Jersey
Bergen
954,236
New York
Erie
939,489
Wisconsin
Milwaukee
932,877
Illinois
DuPage
929,744
Tennessee
Shelby
921,130
Washington
Pierce
909,235
California
Kern
906,422
Texas
Denton
899,498
Connecticut
Hartford
881,217
Michigan
Macomb
873,965
California
San Francisco
870,781
Texas
Hidalgo
865,657
Texas
El Paso
864,835
Connecticut
New Haven
863,728
New Jersey
Essex
863,162
New Jersey
Middlesex
862,111
Massachusetts
Worcester
856,553
Pennsylvania
Montgomery
854,535
Maryland
Baltimore
843,843
California
Ventura
830,639
Ohio
Hamilton
827,957
Washington
Snohomish
822,779
Texas
Fort Bend
815,428
Oregon
Multnomah
809,829
Massachusetts
Essex
797,936
Massachusetts
Suffolk
796,292
Oklahoma
Oklahoma
782,969
Kentucky
Jefferson
779,233
California
San Joaquin
766,149
Georgia
Cobb
764,442
California
San Mateo
764,382
Georgia
DeKalb
760,822
Florida
Lee
759,443
New York
Monroe
730,395
Colorado
El Paso
725,981
Massachusetts
Norfolk
725,046
Florida
Polk
724,854
New Jersey
Hudson
717,204
Missouri
Jackson
715,884
Tennessee
Davidson
715,522
Colorado
Denver
714,342
Illinois
Lake
696,355
Illinois
Will
689,545
-----
District Of Columbia
676,444
New Mexico
Bernalillo
674,721
Alabama
Jefferson
669,279
Oklahoma
Tulsa
660,741
Rhode Island
Providence
659,399
Utah
Utah
657,974
Michigan
Kent
655,070
Colorado
Arapahoe
646,538
Pennsylvania
Bucks
643,615
New Jersey
Monmouth
637,229
New Jersey
Ocean
620,443
Texas
Montgomery
609,863
Kansas
Johnson
609,017
Texas
Williamson
606,612
Florida
Brevard
600,372
Oregon
Washington
588,261
Maryland
Anne Arundel
585,708
Maryland
Baltimore
584,526
Nebraska
Douglas
582,910
Colorado
Jefferson
579,200
Massachusetts
Bristol
576,830
Pennsylvania
Delaware
575,345
New Jersey
Union
570,719
Delaware
New Castle
561,891
Florida
Pasco
561,504
Wisconsin
Dane
553,543
Florida
Volusia
552,984
Pennsylvania
Lancaster
552,878
California
Stanislaus
552,352
Minnesota
Ramsey
541,299
North Carolina
Guilford
540,428
Ohio
Summit
539,339
Washington
Spokane
537,309
Ohio
Montgomery
534,413
Pennsylvania
Chester
530,819
Massachusetts
Plymouth
525,534
South Carolina
Greenville
524,118
New Jersey
Passaic
523,824
Kansas
Sedgwick
523,485
New Jersey
Camden
519,572
Colorado
Adams
516,522
Illinois
Kane
509,285
New Jersey
Morris
503,311
Washington
Clark
498,700
Indiana
Lake
495,747
New York
Richmond
494,967
Idaho
Ada
492,401
Iowa
Polk
488,863
California
Sonoma
486,492
Nevada
Washoe
482,204
Virginia
Prince William
478,971
Tennessee
Knox
Population
State
Answer
476,516
New York
Onondoga
473,117
California
Tulare
470,856
Florida
Seminole
465,825
Massachusetts
Hampden
461,860
New Jersey
Burlington
459,470
Virginia
Virginia Beach
456,781
Louisiana
East Baton Rouge
456,438
Pennsylvania
York
453,491
California
Solano
448,229
California
Santa Barbara
440,781
Louisiana
Jefferson
439,882
Minnesota
Dakota
439,035
California
Monterey
434,006
Florida
Sarasota
431,279
Ohio
Lucas
428,849
Pennsylvania
Berks
425,264
Arizona
Pinal
422,937
New Hampshire
Hillsborough
421,401
Oregon
Clackamas
421,017
Texas
Cameron
420,959
Virginia
Loudoun
416,147
South Carolina
Richland
414,809
Alabama
Mobile
408,235
South Carolina
Charleston
406,978
Wisconsin
Waukesha
406,211
Michigan
Genesee
405,262
Missouri
St. Charles
404,739
California
Placer
401,310
New York
Orange
399,710
Florida
Manatee
399,125
Arkansas
Pulaski
390,357
Ohio
Butler
388,656
Florida
Osceola
388,153
Alabama
Madison
387,340
New Jersey
Mercer
385,410
Indiana
Allen
383,997
Louisiana
Orleans
383,956
Florida
Lake
382,971
Oregon
Lane
382,590
North Carolina
Forsyth
375,908
Florida
Marion
375,752
Florida
Collier
374,853
Ohio
Stark
374,557
Pennsylvania
Lehigh
372,258
Michigan
Washtenaw
372,031
Texas
Brazoria
370,647
Texas
Bell
366,207
Tennessee
Hamilton
364,548
Virginia
Chesterfield
363,887
Minnesota
Anoka
362,679
Utah
Davis
359,066
Colorado
Larimer
357,978
Colorado
Douglas
354,663
Pennsylvania
Westmoreland
353,178
Texas
Nueces
351,029
South Carolina
Horry
350,682
Texas
Galveston
347,467
Indiana
Hamilton
345,920
Oregon
Marion
345,361
New Jersey
Somerset
341,486
Tennessee
Rutherford
338,329
New York
Rockland
334,728
North Carolina
Cumberland
334,389
Virginia
Henrico
332,317
Maryland
Howard
330,758
Colorado
Boulder
329,226
Florida
St. Lucie
328,981
Colorado
Weld
327,997
South Carolina
Spartanburg
325,594
Pennsylvania
Luzerne
324,833
North Carolina
Durham
322,608
Nebraska
Lancaster
322,570
Kentucky
Fayette
321,905
Florida
Escambia
314,848
New York
Albany
314,176
New Hampshire
Rockingham
312,964
Ohio
Lorain
312,951
Pennsylvania
Northampton
310,639
Texas
Lubbock
310,229
Illinois
McHenry
303,069
Maine
Cumberland
302,294
New Jersey
Gloucester
301,578
Missouri
St. Louis
298,915
Missouri
Greene
297,595
Georgia
Clayton
296,200
Michigan
Ottawa
295,911
New York
Dutchess
295,528
Oklahoma
Cleveland
295,291
Georgia
Chatham
294,793
Washington
Thurston
293,991
South Carolina
Lexington
292,198
Florida
Leon
291,247
Alaska
Anchorage
286,401
Pennsylvania
Dauphin
285,350
Illinois
Winnebago
284,900
Michigan
Ingham
284,333
Arkansas
Benton
282,424
California
San Luis Obispo
282,090
South Carolina
York
281,202
California
Merced
278,468
Florida
Alachua
275,611
Washington
Kitsap
274,534
New Jersey
Atlantic
273,425
Florida
St. Johns
272,912
Indiana
St. Joseph
271,717
Maryland
Frederick
270,876
Pennsylvania
Erie
270,861
California
Santa Cruz
269,452
North Carolina
Buncombe
268,740
WIsconsin
Brown
268,555
Connecticut
New London
267,568
Minnesota
Washington
267,114
Texas
Webb
266,620
Georgia
Cherokee
265,859
Illinois
Madison
264,570
Louisiana
St. Tammany
262,321
California
Marin
262,223
Utah
Weber
261,670
Michigan
Kalamazoo
260,924
Maryland
Harford
260,579
Texas
McLennan
259,469
Pennsylvania
Cumberland
257,400
Illinois
St. Clair
256,728
Washington
Yakima
256,526
Texas
Jefferson
253,335
Missouri
Clay
251,283
Georgia
Forsyth
249,422
Virginia
Chesapeake
247,726
Tennessee
Williamson
245,871
Arkansas
Washington
242,337
Ohio
Warren
241,753
Louisiana
Lafayette
241,067
Texas
Hays
240,712
Georgia
Henry
238,643
Virginia
Arlington
238,267
North Carolina
Union
238,005
Virginia
Norfolk
237,848
Louisiana
Caddo
237,378
Delaware
Sussex
236,209
Arizona
Yavapai
235,509
New York
Saratoga
233,849
Texas
Brazos
233,479
Texas
Smith
232,603
Ohio
Lake
232,125
New York
Oneida
231,767
Alabama
Baldwin
231,105
Idaho
Canyon
230,299
Iowa
Linn
229,861
South Carolina
Berkeley
228,996
Massachusetts
Barnstable
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