County Maps US

The most populous counties in the United States

Los Angeles County, California 9,694,934

Which US county has the most people?

What this list shows

  • 3,144 of the 3,144 US counties and county-equivalents have a published figure for population.
  • California accounts for 15 of the top 100, ahead of Texas with 12 and Florida with 9.
  • The top 100 is not made up only of counties. It includes 1 planning region. County-equivalents are ranked alongside counties here, and the type column says which is which.

The top 100

The most populous counties in the United States. Sortable on any column.
RankCountyStateTypePopulation
1Los Angeles CountyCaliforniaCounty9,694,934
2Cook CountyIllinoisCounty5,194,625
3Harris CountyTexasCounty5,045,026
4Maricopa CountyArizonaCounty4,689,558
5San Diego CountyCaliforniaCounty3,282,248
6Orange CountyCaliforniaCounty3,149,507
7Miami-Dade CountyFloridaCounty2,802,029
8Dallas CountyTexasCounty2,661,397
9Kings CountyNew YorkCounty2,653,963
10Riverside CountyCaliforniaCounty2,544,916
11Clark CountyNevadaCounty2,407,226
12Queens CountyNew YorkCounty2,358,182
13King CountyWashingtonCounty2,344,939
14Tarrant CountyTexasCounty2,248,466
15San Bernardino CountyCaliforniaCounty2,224,091
16Bexar CountyTexasCounty2,160,088
17Broward CountyFloridaCounty2,013,317
18Santa Clara CountyCaliforniaCounty1,914,391
19Wayne CountyMichiganCounty1,769,038
20Middlesex CountyMassachusettsCounty1,669,979
21New York CountyNew YorkCounty1,664,862
22Alameda CountyCaliforniaCounty1,636,630
23Sacramento CountyCaliforniaCounty1,618,460
24Palm Beach CountyFloridaCounty1,575,726
25Philadelphia CountyPennsylvaniaCounty1,574,281
26Hillsborough CountyFloridaCounty1,574,115
27Suffolk CountyNew YorkCounty1,546,090
28Orange CountyFloridaCounty1,528,002
29Bronx CountyNew YorkCounty1,406,332
30Nassau CountyNew YorkCounty1,398,939
31Travis CountyTexasCounty1,389,670
32Franklin CountyOhioCounty1,361,536
33Collin CountyTexasCounty1,297,179
34Oakland CountyMichiganCounty1,288,337
35Hennepin CountyMinnesotaCounty1,284,784
36Wake CountyNorth CarolinaCounty1,257,235
37Mecklenburg CountyNorth CarolinaCounty1,233,383
38Cuyahoga CountyOhioCounty1,232,925
39Allegheny CountyPennsylvaniaCounty1,225,035
40Salt Lake CountyUtahCounty1,220,916
41Contra Costa CountyCaliforniaCounty1,170,070
42Fairfax CountyVirginiaCounty1,167,873
43Fulton CountyGeorgiaCounty1,098,791
44Pima CountyArizonaCounty1,074,685
45Montgomery CountyMarylandCounty1,074,582
46Denton CountyTexasCounty1,069,346
47Duval CountyFloridaCounty1,062,963
48Fresno CountyCaliforniaCounty1,035,456
49Gwinnett CountyGeorgiaCounty1,018,099
50Westchester CountyNew YorkCounty1,015,743
51Capitol Planning RegionConnecticutPlanning Region994,115
52Marion CountyIndianaCounty992,196
53St. Louis CountyMissouriCounty990,911
54Honolulu CountyHawaiiCounty988,703
55Bergen CountyNew JerseyCounty977,026
56Fort Bend CountyTexasCounty975,191
57Prince George's CountyMarylandCounty970,374
58Pinellas CountyFloridaCounty948,563
59Erie CountyNew YorkCounty946,741
60Pierce CountyWashingtonCounty946,288
61DuPage CountyIllinoisCounty934,298
62Kern CountyCaliforniaCounty927,068
63Milwaukee CountyWisconsinCounty924,216
64Hidalgo CountyTexasCounty921,549
65Shelby CountyTennesseeCounty910,226
66Essex CountyNew JerseyCounty896,379
67Worcester CountyMassachusettsCounty888,502
68Macomb CountyMichiganCounty886,221
69Middlesex CountyNew JerseyCounty883,335
70El Paso CountyTexasCounty877,858
71Montgomery CountyPennsylvaniaCounty877,643
72Lee CountyFloridaCounty875,607
73Polk CountyFloridaCounty874,790
74Snohomish CountyWashingtonCounty870,656
75Baltimore CountyMarylandCounty847,650
76Hamilton CountyOhioCounty838,418
77Ventura CountyCaliforniaCounty830,851
78Essex CountyMassachusettsCounty826,653
79San Francisco CountyCaliforniaCounty826,079
80San Joaquin CountyCaliforniaCounty823,815
81Oklahoma CountyOklahomaCounty822,125
82Multnomah CountyOregonCounty795,391
83Jefferson CountyKentuckyCounty795,222
84Cobb CountyGeorgiaCounty793,345
85Suffolk CountyMassachusettsCounty791,891
86Montgomery CountyTexasCounty781,194
87DeKalb CountyGeorgiaCounty774,394
88Utah CountyUtahCounty759,859
89El Paso CountyColoradoCounty757,040
90Williamson CountyTexasCounty752,827
91Monroe CountyNew YorkCounty750,506
92Davidson CountyTennesseeCounty745,904
93San Mateo CountyCaliforniaCounty743,568
94Denver CountyColoradoCounty740,613
95Norfolk CountyMassachusettsCounty739,749
96Hudson CountyNew JerseyCounty735,033
97Jackson CountyMissouriCounty732,994
98Lake CountyIllinoisCounty719,339
99Will CountyIllinoisCounty712,253
100Tulsa CountyOklahomaCounty698,782

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

This is the top 100. See the complete table of all 3,144 counties.

Other rankings

Rebuilt from source data 30 August 2026. How these figures are produced.