List of the most populous counties in the United States

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, 2020 and vintage Census population estimates for July 1, 2021.[1]

Counties by population, with darker purples indicating a higher population. From 2020 Census Data.
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, 2020 United States census.

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.[2][3][4] 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.

Many of the most populous counties in the following list are in Southern California, Chicago, Texas and New York and roughly correspond to the most populous cities in the United States. Counties in the Western United States are typically larger, so they often have higher raw populations even with comparable population densities.

ListEdit

This list lists the most populous US counties sorted according to both the 2020 official enumeration and 2021 vintage population estimates by the United States Census Bureau (USCB).

Rank County State Land area April 1,
2020
census
July 1,
2021
estimates
Mid-2020 to
mid-2021 change
County seat
km2[5] mi2[6] absolute %
1 Los Angeles California 10,509.87 4,057.88 10,014,009 9,829,544 -184,465 -1.8 Los Angeles
2 Cook Illinois 2,448.38 945.33 5,275,541 5,173,146 -102,395 -1.9 Chicago
3 Harris Texas 4,411.99 1,703.48 4,731,145 4,728,030 -3,115 -0.1 Houston
4 Maricopa Arizona 23,828.26 9,200.14 4,420,568 4,496,588 76,020 1.7 Phoenix
5 San Diego California 10,895.12 4,206.63 3,298,634 3,286,069 -12,565 -0.4 San Diego
6 Orange 2,047.56 790.57 3,186,989 3,167,809 -19,180 -0.6 Santa Ana
7 Miami-Dade Florida 4,915.06 1,897.72 2,701,767 2,662,777 -38,990 -1.4 Miami
8 Kings New York 183.41 70.82 2,736,074 2,641,052 -95,022 -3.5 Brooklyn, NYC
9 Dallas Texas 2,256.60 871.28 2,613,539 2,586,050 -27,489 -1.1 Dallas
10 Riverside California 18,664.70 7,206.48 2,418,185 2,458,395 40,210 1.7 Riverside
11 Queens New York 281.10 108.53 2,405,464 2,331,143 -74,321 -3.1 Queens, NYC
12 Clark Nevada 20,438.71 7,891.43 2,265,461 2,292,476 27,015 1.2 Las Vegas
13 King Washington 5,479.29 2,115.57 2,269,675 2,252,305 -17,370 -0.8 Seattle
14 San Bernardino California 51,947.23 20,056.94 2,181,654 2,194,710 13,056 0.6 San Bernardino
15 Tarrant Texas 2,236.74 863.61 2,110,640 2,126,477 15,837 0.8 Fort Worth
16 Bexar 3,211.12 1,239.82 2,009,324 2,028,236 18,912 0.9 San Antonio
17 Broward Florida 3,133.33 1,209.79 1,944,375 1,930,983 -13,392 -0.7 Fort Lauderdale
18 Santa Clara California 3,341.34 1,290.10 1,936,259 1,885,508 -50,751 -2.6 San Jose
19 Wayne Michigan 1,585.28 612.08 1,793,561 1,774,816 -18,745 -1.0 Detroit
20 Alameda California 1,914.05 739.02 1,682,353 1,648,556 -33,797 -2.0 Oakland
21 Middlesex Massachusetts 2,118.14 817.82 1,632,002 1,614,742 -17,260 -1.1 Lowell and Cambridge
22 Sacramento California 2,498.42 964.64 1,585,055 1,588,921 3,866 0.2 Sacramento
23 New York New York 59.13 22.83 1,694,251 1,576,876 -117,375 -6.9 Manhattan, NYC
24 Philadelphia Pennsylvania 347.32 134.10 1,603,797 1,576,251 -27,546 -1.7 Philadelphia
25 Suffolk New York 2,362.20 912.05 1,525,920 1,526,344 424 0.0 Riverhead
26 Palm Beach Florida 5,100.00 1,970.00 1,492,191 1,497,987 5,796 0.4 West Palm Beach
27 Hillsborough 2,642.34 1,020.21 1,459,762 1,478,194 18,432 1.3 Tampa
28 Bronx New York 109.03 42.10 1,472,654 1,424,948 -47,706 -3.2 Bronx, NYC
29 Orange Florida 2,339.87 903.43 1,429,908 1,422,746 -7,162 -0.5 Orlando
30 Nassau New York 737.41 284.72 1,395,774 1,390,907 -4,867 -0.3 Mineola
31 Franklin Ohio 1,378.36 532.19 1,323,807 1,321,414 -2,393 -0.2 Columbus
32 Travis Texas 2,564.61 990.20 1,290,188 1,305,154 14,966 1.2 Austin
33 Oakland Michigan 2,247.24 867.66 1,274,395 1,270,017 -4,378 -0.3 Pontiac
34 Hennepin Minnesota 1,433.79 553.59 1,281,565 1,267,416 -14,149 -1.1 Minneapolis
35 Cuyahoga Ohio 1,184.12 457.19 1,264,817 1,249,387 -15,430 -1.2 Cleveland
36 Allegheny Pennsylvania 1,890.88 730.07 1,250,578 1,238,090 -12,488 -1.0 Pittsburgh
37 Salt Lake Utah 1,922.50 742.28 1,185,238 1,186,421 1,183 0.1 Salt Lake City
38 Contra Costa California 1,854.27 715.94 1,165,927 1,161,413 -4,514 -0.4 Martinez
39 Wake North Carolina 2,163.21 835.22 1,129,410 1,150,204 20,794 1.8 Raleigh
40 Fairfax Virginia 1,012.60 390.97 1,150,309 1,139,720 -10,589 -0.9 Fairfax
41 Mecklenburg North Carolina 1,356.75 523.84 1,115,482 1,122,276 6,794 0.6 Charlotte
42 Collin Texas 2,178.76 841.22 1,064,465 1,109,462 44,997 4.2 McKinney
43 Fulton Georgia 1,363.98 526.63 1,066,710 1,065,334 -1,376 -0.1 Atlanta
44 Montgomery Maryland 1,272.34 491.25 1,062,061 1,054,827 -7,234 -0.7 Rockville
45 Pima Arizona 23,794.31 9,187.04 1,043,433 1,052,030 8,597 0.8 Tucson
46 Fresno California 15,431.13 5,957.99 1,008,654 1,013,581 4,927 0.5 Fresno
47 Honolulu Hawaii 1,555.92 600.74 1,016,508 1,000,890 -15,618 -1.5 Honolulu
48 Duval Florida 1,974.07 762.19 995,567 999,935 4,368 0.4 Jacksonville
49 Westchester New York 1,114.98 430.50 1,004,457 997,895 -6,562 -0.7 White Plains
50 St. Louis Missouri 1,315.20 507.80 1,004,125 997,187 -6,938 -0.7 Clayton
51 Marion Indiana 1,026.41 396.30 977,203 971,102 -6,101 -0.6 Indianapolis
52 Gwinnett Georgia 1,114.69 430.38 957,062 964,546 7,484 0.8 Lawrenceville
53 Fairfield Connecticut 1,618.46 624.89 957,419 959,768 2,349 0.2 Bridgeport
54 Pinellas Florida 709.14 273.80 959,107 956,615 -2,492 -0.3 Clearwater
55 Prince George's Maryland 1,250.16 482.69 967,201 955,306 -11,895 -1.2 Upper Marlboro
56 Bergen New Jersey 603.49 233.01 955,732 953,819 -1,913 -0.2 Hackensack
57 Erie New York 2,700.56 1,042.69 954,236 950,683 -3,553 -0.4 Buffalo
58 Denton Texas 2,275.13 878.43 906,422 941,647 35,225 3.9 Denton
59 Milwaukee Wisconsin 625.23 241.40 939,489 928,059 -11,430 -1.2 Milwaukee
60 Pierce Washington 4,324.01 1,669.51 921,130 925,708 4,578 0.5 Tacoma
61 DuPage Illinois 848.22 327.50 932,877 924,885 -7,992 -0.9 Wheaton
62 Shelby Tennessee 1,976.61 763.17 929,744 924,454 -5,290 -0.6 Memphis
63 Kern California 21,061.57 8,131.92 909,235 917,673 8,438 0.9 Bakersfield
64 Hartford Connecticut 1,903.89 735.10 899,498 896,854 -2,644 -0.3 Hartford
65 Hidalgo Texas 4,068.52 1,570.87 870,781 880,356 9,575 1.1 Edinburg
66 Macomb Michigan 1,241.18 479.22 881,217 876,792 -4,425 -0.5 Mount Clemens
67 El Paso Texas 2,622.86 1,012.69 865,657 867,947 2,290 0.3 El Paso
68 New Haven Connecticut 1,565.66 604.51 864,835 863,700 -1,135 -0.1 New Haven
69 Worcester Massachusetts 3,912.88 1,510.77 862,111 862,029 -82 0.0 Worcester
70 Middlesex New Jersey 800.08 308.91 863,162 860,807 -2,355 -0.3 New Brunswick
71 Montgomery Pennsylvania 1,251.07 483.04 856,553 860,578 4,025 0.5 Norristown
72 Fort Bend Texas 2,292 885 822,779 858,527 35,748 4.3 Richmond
73 Essex New Jersey 326.89 126.21 863,728 854,917 -8,811 -1.0 Newark
74 Baltimore Maryland 1,549.59 598.30 854,535 849,316 -5,219 -0.6 Towson
75 Ventura California 4,773.69 1,843.13 843,843 839,784 -4,059 -0.5 Ventura
76 Snohomish Washington 5,406.01 2,087.27 827,957 833,540 5,583 0.7 Everett
77 Hamilton Ohio 1,051.30 405.91 830,639 826,139 -4,500 -0.5 Cincinnati
78 San Francisco California 121.40 46.87 873,965 815,201 -58,764 -6.7 San Francisco
79 Essex Massachusetts 1,275.73 492.56 809,829 807,074 -2,755 -0.3 Salem and Lawrence
80 Multnomah Oregon 1,117.05 431.30 815,428 803,377 -12,051 -1.5 Portland
81 Oklahoma Oklahoma 1,835.83 708.82 796,292 798,575 2,283 0.3 Oklahoma City
82 San Joaquin California 3,603.51 1,391.32 779,233 789,410 10,177 1.3 Stockton
83 Lee Florida 2,031.88 784.51 760,822 787,976 27,154 3.6 Fort Myers
84 Jefferson Kentucky 985.27 380.42 782,969 777,874 -5,095 -0.7 Louisville
85 Suffolk Massachusetts 150.62 58.15 797,936 771,245 -26,691 -3.3 Boston
86 Cobb Georgia 879.43 339.55 766,149 766,802 653 0.1 Marietta
87 DeKalb 693.03 267.58 764,382 757,718 -6,664 -0.9 Decatur
88 Monroe New York 1,702.15 657.21 759,443 755,160 -4,283 -0.6 Rochester
89 Polk Florida 4,660 1,798 725,046 753,520 28,474 3.9 Bartow
90 San Mateo California 1,161.37 448.41 764,442 737,888 -26,554 -3.5 Redwood City
91 El Paso Colorado 5,508.39 2,126.80 730,395 737,867 7,472 1.0 Colorado Springs
92 Norfolk Massachusetts 1,025.91 396.11 725,981 724,505 -1,476 -0.2 Dedham
93 Jackson Missouri 1,565.55 604.46 717,204 716,862 -342 0.0 Independence and Kansas City
94 Denver Colorado 401.36 154.97 715,522 711,463 -4,059 -0.6 Denver
95 Lake Illinois 1,149.10 443.67 714,342 711,239 -3,103 -0.4 Waukegan
96 Davidson Tennessee 1,305.44 504.03 715,884 703,953 -11,931 -1.7 Nashville
97 Hudson New Jersey 119.63 46.19 724,854 702,463 -22,391 -3.1 Jersey City
98 Will Illinois 2,167.58 836.91 696,355 697,252 897 0.1 Joliet
99 Utah Utah 5,188.91 2,003.45 659,399 684,986 25,587 3.9 Provo
100 Bernalillo New Mexico 3,006.53 1,160.83 676,444 674,393 -2,051 -0.3 Albuquerque

GalleryEdit

ReferencesEdit

  1. ^ "Over Two-Thirds of the Nation's Counties Had Natural Decrease in 2021". United States Census Bureau. Retrieved March 27, 2022.
  2. ^ "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.
  3. ^ "City and County Organizational Chart". City and County of San Francisco. Archived from the original on February 3, 2008. Retrieved January 23, 2008.
  4. ^ "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.
  5. ^ GeoHive - the United States of America - US States and Counties Archived April 30, 2012, at the Wayback Machine (attached Excel spreadsheet)
  6. ^ The area in square kilometers of the column to the left divided by 2.589988110336 (1.6093442).