List of the most populous counties in the United States

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A map of the counties and county equivalents of the United States. The 100 most populous counties are highlighted, with counties having more than one million residents in orange and counties having fewer than one million residents in green, based on the results of the April 1, 2010 United States census.

This is a list of the 100 most populous counties in the United States based on the national decennial US census conducted on April 1, 2010 and on April 1, 2020.

Many of the counties on the list include major cities or metropolitan areas in all parts of the United States. Six of the listed counties have consolidated city and county government, namely the City and County of Honolulu, Metropolitan Government of Nashville and Davidson County, Tennessee, City and County of Philadelphia, City and County of San Francisco, City of Jacksonville and Duval County and City and County of Denver.[1][2][3] New York County, Bronx County, Kings County, Queens County and Richmond County are coterminous with the respective boroughs of New York City; they fall under the jurisdiction of the combined city government.

List[edit]

This list lists the most populous US counties and the District of Columbia sorted according to the 2020 official enumeration by the United States Census Bureau (USCB).

Rank County State Land area April 1,
2010
census
April 1,
2020
census
Mid-2010 to
mid-2020 change
County seat
km2[4] mi2[5] absolute %
1 Los Angeles California 10,509.87 4,057.88 9,818,605 10,014,009 195,404 2.0 Los Angeles
2 Cook Illinois 2,448.38 945.33 5,194,675 5,275,541 80,866 1.6 Chicago
3 Harris Texas 4,411.99 1,703.48 4,092,459 4,731,145 638,686 15.6 Houston
4 Maricopa Arizona 23,828.26 9,200.14 3,817,117 4,420,568 603,451 15.8 Phoenix
5 San Diego California 10,895.12 4,206.63 3,095,313 3,298,634 203,321 6.6 San Diego
6 Orange 2,047.56 790.57 3,010,232 3,186,989 176,757 5.9 Santa Ana
7 Kings New York 183.41 70.82 2,504,700 2,736,074 231,374 9.2 Brooklyn, NYC
8 Miami-Dade Florida 4,915.06 1,897.72 2,496,435 2,701,767 205,332 8.2 Miami
9 Dallas Texas 2,256.60 871.28 2,368,139 2,613,539 245,400 10.4 Dallas
10 Riverside California 18,664.70 7,206.48 2,189,641 2,418,185 228,544 10.4 Riverside
11 Queens New York 281.10 108.53 2,230,722 2,405,464 174,742 7.8 Queens, NYC
12 King Washington 5,479.29 2,115.57 1,931,249 2,269,675 338,426 17.5 Seattle
13 Clark Nevada 20,438.71 7,891.43 1,951,269 2,265,461 314,192 16.1 Las Vegas
14 San Bernardino California 51,947.23 20,056.94 2,035,210 2,181,654 146,444 7.2 San Bernardino
15 Tarrant Texas 2,236.74 863.61 1,809,034 2,110,640 301,606 16.7 Fort Worth
16 Bexar 3,211.12 1,239.82 1,714,773 2,009,324 294,551 17.2 San Antonio
17 Broward Florida 3,133.33 1,209.79 1,748,066 1,944,375 196,309 11.2 Fort Lauderdale
18 Santa Clara California 3,341.34 1,290.10 1,781,642 1,936,259 154,617 8.7 San Jose
19 Wayne Michigan 1,585.28 612.08 1,820,584 1,793,561 -27,023 -1.5 Detroit
20 New York New York 59.13 22.83 1,585,873 1,694,251 108,378 6.8 Manhattan, NYC
21 Alameda California 1,914.05 739.02 1,510,271 1,682,353 172,082 11.4 Oakland
22 Middlesex Massachusetts 2,118.14 817.82 1,503,085 1,632,002 128,917 8.6 Lowell and Cambridge
23 Philadelphia Pennsylvania 347.32 134.10 1,526,006 1,603,797 77,791 5.1 Philadelphia
24 Sacramento California 2,498.42 964.64 1,418,788 1,585,055 166,267 11.7 Sacramento
25 Suffolk New York 2,362.20 912.05 1,493,350 1,525,920 32,570 2.2 Riverhead
26 Palm Beach Florida 5,100.00 1,970.00 1,320,134 1,492,191 172,057 13.0 West Palm Beach
27 Bronx New York 109.03 42.10 1,385,108 1,472,654 87,546 6.3 Bronx, NYC
28 Hillsborough Florida 2,642.34 1,020.21 1,229,226 1,459,762 230,536 18.8 Tampa
29 Orange 2,339.87 903.43 1,145,956 1,429,908 283,952 24.8 Orlando
30 Nassau New York 737.41 284.72 1,339,532 1,395,774 56,242 4.2 Mineola
31 Franklin Ohio 1,378.36 532.19 1,163,414 1,323,807 160,393 13.8 Columbus
32 Travis Texas 2,564.61 990.20 1,024,266 1,290,188 265,922 26.0 Austin
33 Hennepin Minnesota 1,433.79 553.59 1,152,425 1,281,565 129,140 11.2 Minneapolis
34 Oakland Michigan 2,247.24 867.66 1,202,362 1,274,395 72,033 6.0 Pontiac
35 Cuyahoga Ohio 1,184.12 457.19 1,280,122 1,264,817 -15,305 -1.2 Cleveland
36 Allegheny Pennsylvania 1,890.88 730.07 1,223,348 1,250,578 27,230 2.2 Pittsburgh
37 Salt Lake Utah 1,922.50 742.28 1,029,655 1,185,238 155,583 15.1 Salt Lake City
38 Contra Costa California 1,854.27 715.94 1,049,025 1,165,927 116,902 11.1 Martinez
39 Fairfax Virginia 1,012.60 390.97 1,081,726 1,150,309 68,583 6.3 Fairfax
40 Wake North Carolina 2,163.21 835.22 900,993 1,129,410 228,417 25.4 Raleigh
41 Mecklenburg 1,356.75 523.84 919,628 1,115,482 195,854 21.3 Charlotte
42 Fulton Georgia 1,363.98 526.63 920,581 1,066,710 146,129 15.9 Atlanta
43 Collin Texas 2,178.76 841.22 782,341 1,064,465 282,124 36.1 McKinney
44 Montgomery Maryland 1,272.34 491.25 971,777 1,062,061 90,284 9.3 Rockville
45 Pima Arizona 23,794.31 9,187.04 980,263 1,043,433 63,170 6.4 Tucson
46 Honolulu Hawaii 1,555.92 600.74 953,207 1,016,508 63,301 6.6 Honolulu
47 Fresno California 15,431.13 5,957.99 930,450 1,008,654 78,204 8.4 Fresno
48 Westchester New York 1,114.98 430.50 949,113 1,004,457 55,344 5.8 White Plains
49 St. Louis Missouri 1,315.20 507.80 998,954 1,004,125 5,171 0.5 Clayton
50 Duval Florida 1,974.07 762.19 864,263 995,567 131,304 15.2 Jacksonville
51 Marion Indiana 1,026.41 396.30 903,393 977,203 73,810 8.2 Indianapolis
52 Prince George's Maryland 1,250.16 482.69 863,420 967,201 103,781 10.7 Upper Marlboro
53 Pinellas Florida 709.14 273.80 916,542 959,107 42,565 4.6 Clearwater
54 Fairfield Connecticut 1,618.46 624.89 916,829 957,419 40,590 4.4 Bridgeport
55 Gwinnett Georgia 1,114.69 430.38 805,321 957,062 151,741 18.8 Lawrenceville
56 Bergen New Jersey 603.49 233.01 905,116 955,732 50,616 5.6 Hackensack
57 Erie New York 2,700.56 1,042.69 919,040 954,236 35,196 3.8 Buffalo
58 Milwaukee Wisconsin 625.23 241.40 947,735 939,489 -8,246 -0.9 Milwaukee
59 DuPage Illinois 848.22 327.50 916,924 932,877 15,953 1.7 Wheaton
60 Shelby Tennessee 1,976.61 763.17 927,644 929,744 2,100 0.2 Memphis
61 Pierce Washington 4,324.01 1,669.51 795,225 921,130 125,905 15.8 Tacoma
62 Kern California 21,061.57 8,131.92 839,631 909,235 69,604 8.3 Bakersfield
63 Denton Texas 2,275.13 878.43 662,614 906,422 243,808 36.8 Denton
64 Hartford Connecticut 1,903.89 735.10 894,014 899,498 5,484 0.6 Hartford
65 Macomb Michigan 1,241.18 479.22 840,978 881,217 40,239 4.8 Mount Clemens
66 San Francisco California 121.40 46.87 805,235 873,965 68,730 8.5 San Francisco
67 Hidalgo Texas 4,068.52 1,570.87 774,769 870,781 96,012 12.4 Edinburg
68 El Paso 2,622.86 1,012.69 800,647 865,657 65,010 8.1 El Paso
69 New Haven Connecticut 1,565.66 604.51 862,477 864,835 2,358 0.3 New Haven
70 Essex New Jersey 326.89 126.21 783,969 863,728 79,759 10.2 Newark
71 Middlesex 800.08 308.91 809,858 863,162 53,304 6.6 New Brunswick
72 Worcester Massachusetts 3,912.88 1,510.77 798,552 862,111 63,559 8.0 Worcester
73 Montgomery Pennsylvania 1,251.07 483.04 799,874 856,553 56,679 7.1 Norristown
74 Baltimore Maryland 1,549.59 598.30 805,029 854,535 49,506 6.1 Towson
75 Ventura California 4,773.69 1,843.13 823,318 843,843 20,525 2.5 Ventura
76 Hamilton Ohio 1,051.30 405.91 802,374 830,639 28,265 3.5 Cincinnati
77 Snohomish Washington 5,406.01 2,087.27 713,335 827,957 114,622 16.1 Everett
78 Fort Bend Texas 2,292 885 585,375 822,779 237,404 40.6 Richmond
79 Multnomah Oregon 1,117.05 431.30 735,334 815,428 80,094 10.9 Portland
80 Essex Massachusetts 1,275.73 492.56 743,159 809,829 66,670 9.0 Salem and Lawrence
81 Suffolk 150.62 58.15 722,023 797,936 75,913 10.5 Boston
82 Oklahoma Oklahoma 1,835.83 708.82 718,633 796,292 77,659 10.8 Oklahoma City
83 Jefferson Kentucky 985.27 380.42 741,096 782,969 41,873 5.7 Louisville
84 San Joaquin California 3,603.51 1,391.32 685,306 779,233 93,927 13.7 Stockton
85 Cobb Georgia 879.43 339.55 688,078 766,149 78,071 11.3 Marietta
86 San Mateo California 1,161.37 448.41 718,451 764,442 45,991 6.4 Redwood City
87 DeKalb Georgia 693.03 267.58 691,893 764,382 72,489 10.5 Decatur
88 Lee Florida 2,031.88 784.51 618,754 760,822 142,068 23.0 Fort Myers
89 Monroe New York 1,702.15 657.21 744,344 759,443 15,099 2.0 Rochester
90 El Paso Colorado 5,508.39 2,126.80 622,263 730,395 108,132 17.4 Colorado Springs
91 Norfolk Massachusetts 1,025.91 396.11 670,850 725,981 55,131 8.2 Dedham
92 Polk Florida 4,660 1,798 602,095 725,046 122,951 20.4 Bartow
93 Hudson New Jersey 119.63 46.19 634,266 724,854 90,588 12.5 Jersey City
94 Jackson Missouri 1,565.55 604.46 674,158 717,204 43,046 6.4 Independence and Kansas City
95 Davidson Tennessee 1,305.44 504.03 626,681 715,884 89,203 14.2 Nashville
96 Denver Colorado 401.36 154.97 600,158 715,522 115,364 19.2 Denver
97 Lake Illinois 1,149.10 443.67 703,462 714,342 10,880 1.5 Waukegan
98 Will 2,167.58 836.91 677,560 696,355 18,795 2.8 Joliet
99 District of Columbia 177.0 68.34 601,723 689,545 87,822 14.6 N/A
100 Bernalillo New Mexico 3,006.53 1,160.83 662,564 676,444 13,880 2.1 Albuquerque

Gallery[edit]

References[edit]

  1. ^ "This Is Your City and County of Honolulu Government". City and County of Honolulu. Archived from the original on January 20, 2008. Retrieved January 23, 2008.
  2. ^ "City and County Organizational Chart". City and County of San Francisco. Archived from the original on February 3, 2008. Retrieved January 23, 2008.
  3. ^ "Active Colorado Municipalities as of January 26, 2010". Colorado Department of Local Affairs. Archived from the original on December 12, 2009. Retrieved January 26, 2010.
  4. ^ GeoHive - the United States of America - US States and Counties Archived April 30, 2012, at the Wayback Machine (attached Excel spreadsheet)
  5. ^ The area in square kilometers of the column to the left divided by 2.589988110336 (1.6093442).