List of the most populous counties in the United States Article

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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 largest counties in the United States by population based on the national decennial US census conducted on 1 April 2010 and subsequent mid-2010 and mid-2014 official estimates released by the United States Census Bureau (USCB).

Many of the counties on the list include major cities or metropolitan areas. Five 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 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, and fall under the jurisdiction of the combined city government. Connecticut, Rhode Island, and most of Massachusetts also don't have county governments.

List

This list lists the most populous US counties sorted according to the mid-2017 official estimate by the United States Census Bureau (USCB).

Rank County State Land
area
(km2) [4]
Land
area
(mi2) [5]
April 1,
2010
census
July 1,
2017
official
estimate
Mid-2010
to
mid-2017
change
(absolute)
Mid-2010
to
mid-2017
change
(%)
County seat
1 Los Angeles California 10,509.87 4,057.88 9,818,605 10,163,507 344,902 3.51 Los Angeles
2 Cook Illinois 2,448.38 945.33 5,194,675 5,211,263 16,588 0.32 Chicago
3 Harris Texas 4,411.99 1,703.48 4,092,459 4,652,980 560,521 13.70 Houston
4 Maricopa Arizona 23,828.26 9,200.14 3,817,117 4,307,033 489,916 12.83 Phoenix
5 San Diego California 10,895.12 4,206.63 3,095,313 3,337,685 242,372 7.83 San Diego
6 Orange California 2,047.56 790.57 3,010,232 3,190,400 180,168 5.99 Santa Ana
7 Miami-Dade Florida 4,915.06 1,897.72 2,496,435 2,751,796 255,361 10.23 Miami
8 Kings New York 183.41 70.82 2,504,700 2,648,771 144,071 5.75 Brooklyn
9 Dallas Texas 2,256.60 871.28 2,368,139 2,618,148 250,009 10.56 Dallas
10 Riverside California 18,664.70 7,206.48 2,189,641 2,423,266 233,625 10.67 Riverside
11 Queens New York 281.10 108.53 2,230,722 2,358,582 127,860 5.73 Jamaica
12 Clark Nevada 20,438.71 7,891.43 1,951,269 2,204,079 252,810 12.96 Las Vegas
13 King Washington 5,479.29 2,115.57 1,931,249 2,188,649 257,400 13.33 Seattle
14 San Bernardino California 51,947.23 20,056.94 2,035,210 2,157,404 122,194 6.00 San Bernardino
15 Tarrant Texas 2,236.74 863.61 1,809,034 2,054,475 245,441 13.57 Fort Worth
16 Bexar Texas 3,211.12 1,239.82 1,714,773 1,958,578 243,805 14.22 San Antonio
17 Santa Clara California 3,341.34 1,290.10 1,781,642 1,938,153 156,511 8.78 San Jose
18 Broward Florida 3,133.33 1,209.79 1,748,066 1,935,878 243,805 14.22 Fort Lauderdale
19 Wayne Michigan 1,585.28 612.08 1,820,584 1,753,616 -66,968 -3.68 Detroit
20 New York New York 59.13 22.83 1,585,873 1,664,727 78,854 4.97 New York City
21 Alameda California 1,914.05 739.02 1,510,271 1,663,190 152,919 10.13 Oakland
22 Middlesex Massachusetts 2,118.14 817.82 1,503,085 1,602,947 99,862 6.64 Lowell and Cambridge
23 Philadelphia Pennsylvania 347.32 134.10 1,526,006 1,580,863 54,857 3.59 Philadelphia
24 Sacramento California 2,498.42 964.64 1,418,788 1,530,615 111,827 7.88 Sacramento
25 Suffolk New York 2,362.20 912.05 1,493,350 1,492,953 -397 -0.03 Riverhead
26 Bronx New York 109.03 42.10 1,385,108 1,471,160 86,502 6.21 Bronx
27 Palm Beach Florida 5,101.66 1,969.76 1,320,134 1,471,150 151,016 11.44 West Palm Beach
28 Hillsborough Florida 2,642.34 1,020.21 1,229,226 1,408,566 179,340 14.59 Tampa
29 Nassau New York 737.41 284.72 1,339,532 1,369,514 29,982 2.24 Mineola
30 Orange Florida 2,339.87 903.43 1,145,956 1,348,975 203,019 17.72 Orlando
31 Franklin Ohio 1,378.36 532.19 1,163,414 1,291,981 128,567 11.05 Columbus
32 Hennepin Minnesota 1,433.79 553.59 1,152,425 1,252,024 99,599 8.64 Minneapolis
33 Oakland Michigan 2,247.24 867.66 1,202,362 1,250,836 48,474 4.03 Pontiac
34 Cuyahoga Ohio 1,184.12 457.19 1,280,122 1,248,514 -31,608 -2.47 Cleveland
35 Travis Texas 2,564.61 990.20 1,024,266 1,226,698 202,432 19.76 Austin
36 Allegheny Pennsylvania 1,890.88 730.07 1,223,348 1,223,048 -300 -0.02 Pittsburgh
37 Fairfax Virginia 1,012.60 390.97 1,081,726 1,148,433 66,707 6.17 Fairfax
38 Contra Costa California 1,854.27 715.94 1,049,025 1,147,439 98,414 9.38 Martinez
39 Salt Lake Utah 1,922.50 742.28 1,029,655 1,135,649 105,994 10.29 Salt Lake City
40 Mecklenburg North Carolina 1,356.75 523.84 919,628 1,076,837 157,209 17.09 Charlotte
41 Wake North Carolina 2,163.21 835.22 900,993 1,072,203 171,210 19.00 Raleigh
42 Montgomery Maryland 1,272.34 491.25 971,777 1,058,810 87,033 8.96 Rockville
43 Fulton Georgia 1,363.98 526.63 920,581 1,041,423 120,842 13.13 Atlanta
44 Pima Arizona 23,794.31 9,187.04 980,263 1,022,769 42,506 4.34 Tucson
45 St. Louis Missouri 1,315.20 507.80 998,954 996,726 -2,228 -0.22 Clayton
46 Fresno California 15,431.13 5,957.99 930,450 989,255 58,805 6.32 Fresno
47 Honolulu Hawaii 1,555.92 600.74 953,207 988,650 35,443 3.72 Honolulu
48 Westchester New York 1,114.98 430.50 949,113 980,244 31,131 3.28 White Plains
49 Pinellas Florida 709.14 273.80 916,542 970,637 54,095 5.90 Clearwater
50 Collin Texas 2,178.76 841.22 782,341 969,603 187,262 23.94 McKinney
51 Milwaukee Wisconsin 625.23 241.40 947,735 952,085 4,350 0.46 Milwaukee
52 Marion Indiana 1,026.41 396.30 903,393 950,082 46,689 5.17 Indianapolis
53 Fairfield Connecticut 1,618.46 624.89 916,829 949,921 33,091 3.61 Bridgeport
54 Bergen New Jersey 603.49 233.01 905,116 948,906 43,290 4.78 Hackensack
55 Duval Florida 1,974.07 762.19 864,263 937,934 73,761 8.52 Jacksonville
56 Shelby Tennessee 1,976.61 763.17 927,644 936,961 9,317 1.00 Memphis
57 DuPage Illinois 848.22 327.50 916,924 930,128 13,204 1.44 Wheaton
58 Erie New York 2,700.56 1,042.69 919,040 925,528 6,488 0.71 Buffalo
59 Gwinnett Georgia 1,114.69 430.38 805,321 920,260 114,939 14.27 Lawrenceville
60 Prince George's Maryland 1,250.16 482.69 863,420 912,756 49,226 5.71 Upper Marlboro
61 Hartford Connecticut 1,903.89 735.10 894,014 895,388 1,374 0.15 Hartford
62 Kern California 21,061.57 8,131.92 839,631 893,119 53,488 6.37 Bakersfield
63 San Francisco California 121.40 46.87 805,235 884,363 79,128 9.83 San Francisco
64 Pierce Washington 4,324.01 1,669.51 795,225 876,764 81,539 10.25 Tacoma
65 Macomb Michigan 1,241.18 479.22 840,978 871,375 30,397 3.61 Mount Clemens
66 Hidalgo Texas 4,068.52 1,570.87 774,769 860,661 85,892 11.09 Edinburg
67 New Haven Connecticut 1,565.66 604.51 862,477 860,435 -2,042 -0.24 New Haven
68 Ventura California 4,773.69 1,843.13 823,318 854,223 30,905 3.75 Ventura
69 Middlesex New Jersey 800.08 308.91 809,858 842,798 32,940 4.07 New Brunswick
70 El Paso Texas 2,622.86 1,012.69 800,647 840,410 39,763 4.97 El Paso
71 Denton Texas 2,275.13 878.43 662,614 836,210 173,596 26.20 Denton
72 Baltimore Maryland 1,549.59 598.30 805,029 832,468 27,439 3.41 Towson
73 Worcester Massachusetts 3,912.88 1,510.77 798,552 826,116 27,564 3.45 Worcester
74 Montgomery Pennsylvania 1,251.07 483.04 799,874 826,075 26,201 3.28 Norristown
75 Hamilton Ohio 1,051.30 405.91 802,374 813,822 11,448 1.43 Cincinnati
76 Essex New Jersey 326.89 126.21 783,969 808,285 24,316 3.10 Newark
77 Multnomah Oregon 1,117.05 431.30 735,334 807,555 72,221 9.82 Portland
78 Snohomish Washington 5,406.01 2,087.27 713,335 801,633 88,298 12.38 Everett
79 Suffolk Massachusetts 150.62 58.15 722,023 797,939 75,916 10.51 Boston
80 Oklahoma Oklahoma 1,835.83 708.82 718,633 787,958 69,325 9.65 Oklahoma City
81 Essex Massachusetts 1,275.73 492.56 743,159 785,205 42,046 5.66 Salem and Lawrence
82 San Mateo California 1,161.37 448.41 718,451 771,410 52,959 7.37 Redwood City
83 Jefferson Kentucky 985.27 380.42 741,096 771,158 30,062 4.06 Louisville
84 Fort Bend Texas 2,292 885 585,375 764,828 179,453 30.66 Richmond
85 Cobb Georgia 879.43 339.55 688,078 755,754 67,676 9.84 Marietta
86 DeKalb Georgia 693.03 267.58 691,893 753,253 61,360 8.87 Decatur
87 Monroe New York 1,702.15 657.21 744,344 747,642 3,298 0.44 Rochester
88 San Joaquin California 3,603.51 1,391.32 685,306 745,424 60,118 8.77 Stockton
89 Lee Florida 2,031.88 784.51 618,754 739,224 120,470 19.47 Fort Myers
90 Denver Colorado 401.36 154.97 600,158 704,621 104,463 17.41 Denver
91 Lake Illinois 1,149.10 443.67 703,462 703,520 58 0.01 Waukegan
92 Norfolk Massachusetts 1,025.91 396.11 670,850 700,322 29,472 4.39 Dedham
93 El Paso Colorado 5,508.39 2,126.80 622,263 699,232 76,969 12.37 Colorado Springs
94 Jackson Missouri 1,565.55 604.46 674,158 698,895 24,737 3.67 Independence and Kansas City
95 Washington, D.C. 177.0 68.34 601,723 693,972 92,249 15.33 N/A
96 Will Illinois 2,167.58 836.91 677,560 692,661 15,101 2.23 Joliet
97 Hudson New Jersey 119.63 46.19 634,266 691,643 57,377 9.05 Jersey City
98 Davidson Tennessee 1,305.44 504.03 626,681 691,423 64,562 10.30 Nashville
99 Polk Florida 5,208 2,011 602,095 686,483 84,388 14.02 Bartow
100 Bernalillo New Mexico 3,006.53 1,160.83 662,564 676,773 14,209 2.14 Albuquerque
101 Jefferson Alabama 2,878.19 1,111.28 658,466 659,197 731 0.11 Birmingham
Rank County State Land
area
(km2) [4]
Land
area
(mi2) [5]
April 1,
2010
census
July 1,
2017
official
estimate
Mid-2010
to
mid-2017
change
(absolute)
Mid-2010
to
mid-2017
change
(%)
County seat

Gallery

References

  1. ^ "This Is Your City and County of Honolulu Government". City and County of Honolulu. Archived from the original on 2008-01-20. Retrieved 2008-01-23.
  2. ^ "City and County Organizational Chart". City and County of San Francisco. Archived from the original on 2008-02-03. Retrieved 2008-01-23.
  3. ^ "Active Colorado Municipalities as of January 26, 2010". Colorado Department of Local Affairs. Archived from the original on November 23, 2010. Retrieved 2010-01-26.
  4. ^ a b GeoHive - the United States of America - US States and Counties Archived 2012-04-30 at the Wayback Machine (attached Excel spreadsheet)
  5. ^ a b The area in square kilometers of the column to the left divided by 2.589988110336 (1.609344²).