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The 100 most populous US counties

Los Angeles County9.8MCook County5.2MHarris County5MMaricopa County4.7MSan Diego County3.3MOrange County3.2MMiami-Dade County2.8MDallas County2.7MKings County2.6MRiverside County2.5MClark County2.4MKing County2.3MQueens County2.3MTarrant County2.2MSan Bernardino County2.2M
#CountyPopulation
1Los Angeles County9,757,179
2Cook County5,182,617
3Harris County5,009,302
4Maricopa County4,673,096
5San Diego County3,298,799
6Orange County3,170,435
7Miami-Dade County2,838,461
8Dallas County2,656,028
9Kings County2,617,631
10Riverside County2,529,933
11Clark County2,398,871
12King County2,340,211
13Queens County2,316,841
14Tarrant County2,230,708
15San Bernardino County2,214,281
16Bexar County2,127,737
17Broward County2,037,472
18Santa Clara County1,926,325
19Wayne County1,771,063
20Middlesex County1,668,956
21New York County1,660,664
22Alameda County1,649,060
23Sacramento County1,611,231
24Palm Beach County1,582,055
25Hillsborough County1,581,426
26Philadelphia County1,573,916
27Suffolk County1,535,909
28Orange County1,533,646
29Nassau County1,392,438
30Bronx County1,384,724
31Travis County1,363,767
32Franklin County1,356,303
33Oakland County1,296,888
34Hennepin County1,273,334
35Collin County1,254,658
36Cuyahoga County1,240,594
37Wake County1,232,444
38Allegheny County1,231,814
39Salt Lake County1,216,274
40Mecklenburg County1,206,285
41Contra Costa County1,172,607
42Fairfax County1,160,925
43Fulton County1,090,354
44Montgomery County1,082,273
45Pima County1,080,149
46Duval County1,055,159
47Denton County1,045,120
48Fresno County1,024,125
49Westchester County1,006,447
50Gwinnett County1,003,869
51Honolulu County998,747
52St. Louis County992,929
53Capitol Planning Region991,508
54Marion County981,628
55Bergen County978,641
56Prince George's County966,629
57Pinellas County965,870
58Fort Bend County958,434
59Erie County950,602
60Pierce County941,170
61DuPage County937,142
62Milwaukee County924,740
63Kern County922,529
64Hidalgo County914,820
65Shelby County910,530
66Middlesex County890,119
67Macomb County886,175
68Essex County881,527
69Worcester County881,248
70Montgomery County879,190
71El Paso County875,784
72Snohomish County864,113
73Lee County860,959
74Polk County852,878
75Baltimore County852,425
76Hamilton County837,359
77Ventura County835,427
78San Francisco County827,526
79Essex County823,938
80Oklahoma County816,490
81San Joaquin County816,108
82Multnomah County795,897
83Jefferson County793,881
84Suffolk County793,144
85Cobb County787,538
86DeKalb County770,307
87El Paso County752,772
88Monroe County752,202
89Montgomery County749,613
90Utah County747,234
91San Mateo County742,893
92Norfolk County740,754
93Hudson County736,185
94Davidson County729,505
95Denver County729,019
96Williamson County727,480
97Jackson County727,362
98Lake County718,604
99Will County708,583
100District of Columbia702,250

Top 100 entries with a recorded value; entries without data are not ranked.