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List of the most populous counties in the United States

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 counties in the United States with a population of more than 100,000 based on the national decennial US census conducted on April 1, 2010 and subsequent mid-2010 and mid-2018 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.

ListEdit

This list lists the most populous US counties sorted according to the mid-2018 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,
2018
official
estimate
Mid-2010
to
mid-2018
change
(absolute)
Mid-2010
to
mid-2018
change
(%)
County seat
1 Los Angeles California 10,509.87 4,057.88 9,818,605 10,105,518 286,193 2.92 Los Angeles
2 Cook Illinois 2,448.38 945.33 5,194,675 5,180,493 -14,182 -0.27 Chicago
3 Harris Texas 4,411.99 1,703.48 4,092,459 4,698,619 606,160 14.81 Houston
4 Maricopa Arizona 23,828.26 9,200.14 3,817,117 4,410,824 593,707 15.55 Phoenix
5 San Diego California 10,895.12 4,206.63 3,095,313 3,343,364 248,051 8.01 San Diego
6 Orange California 2,047.56 790.57 3,010,232 3,185,968 175,736 5.84 Santa Ana
7 Miami-Dade Florida 4,915.06 1,897.72 2,496,435 2,761,581 265,146 10.62 Miami
8 Dallas Texas 2,256.60 871.28 2,368,139 2,637,772 269,633 11.39 Dallas
9 Kings New York 183.41 70.82 2,504,700 2,582,830 78,130 3.12 Brooklyn, NYC
10 Riverside California 18,664.70 7,206.48 2,189,641 2,450,758 261,117 11.93 Riverside
11 Queens New York 281.10 108.53 2,230,722 2,278,906 48,184 2.16 Queens, NYC
12 King Washington 5,479.29 2,115.57 1,931,249 2,233,163 301,914 15.63 Seattle
13 Clark Nevada 20,438.71 7,891.43 1,951,269 2,231,647 280,378 14.37 Las Vegas
14 San Bernardino California 51,947.23 20,056.94 2,035,210 2,171,603 136,393 6.70 San Bernardino
15 Tarrant Texas 2,236.74 863.61 1,809,034 2,084,931 275,897 15.25 Fort Worth
16 Bexar Texas 3,211.12 1,239.82 1,714,773 1,986,049 271,276 15.82 San Antonio
17 Broward Florida 3,133.33 1,209.79 1,748,066 1,951,260 203,194 11.62 Fort Lauderdale
18 Santa Clara California 3,341.34 1,290.10 1,781,642 1,937,570 155,928 8.75 San Jose
19 Wayne Michigan 1,585.28 612.08 1,820,584 1,753,893 -66,691 -3.66 Detroit
20 Alameda California 1,914.05 739.02 1,510,271 1,666,753 156,482 10.36 Oakland
21 New York New York 59.13 22.83 1,585,873 1,628,701 42,828 2.70 Manhattan, NYC
22 Middlesex Massachusetts 2,118.14 817.82 1,503,085 1,614,714 111,629 7.43 Lowell and Cambridge
23 Philadelphia Pennsylvania 347.32 134.10 1,526,006 1,584,138 58,132 3.81 Philadelphia
24 Sacramento California 2,498.42 964.64 1,418,788 1,540,975 122,187 8.61 Sacramento
25 Palm Beach Florida 5,101.66 1,969.76 1,320,134 1,485,941 165,807 12.56 West Palm Beach
26 Suffolk New York 2,362.20 912.05 1,493,350 1,481,093 -12,257 -0.82 Riverhead
27 Hillsborough Florida 2,642.34 1,020.21 1,229,226 1,436,888 207,662 16.89 Tampa
28 Bronx New York 109.03 42.10 1,385,108 1,432,132 47,024 3.39 Bronx, NYC
29 Nassau New York 737.41 284.72 1,339,532 1,358,343 18,811 1.40 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 1,310,300 146,886 12.63 Columbus
32 Hennepin Minnesota 1,433.79 553.59 1,152,425 1,259,428 107,003 9.29 Minneapolis
33 Oakland Michigan 2,247.24 867.66 1,202,362 1,259,201 56,839 4.73 Pontiac
34 Travis Texas 2,564.61 990.20 1,024,266 1,248,743 224,477 21.92 Austin
35 Cuyahoga Ohio 1,184.12 457.19 1,280,122 1,243,857 -36,265 -2.83 Cleveland
36 Allegheny Pennsylvania 1,890.88 730.07 1,223,348 1,218,452 -4,896 -0.40 Pittsburgh
37 Salt Lake Utah 1,922.50 742.28 1,029,655 1,152,633 122,978 11.94 Salt Lake City
38 Fairfax Virginia 1,012.60 390.97 1,081,726 1,150,795 69,069 6.39 Fairfax
39 Contra Costa California 1,854.27 715.94 1,049,025 1,150,215 101,190 9.65 Martinez
40 Mecklenburg North Carolina 1,356.75 523.84 919,628 1,093,901 174,273 18.95 Charlotte
41 Wake North Carolina 2,163.21 835.22 900,993 1,092,305 191,312 21.23 Raleigh
42 Montgomery Maryland 1,272.34 491.25 971,777 1,052,567 80,790 8.31 Rockville
43 Fulton Georgia 1,363.98 526.63 920,581 1,050,114 129,533 14.07 Atlanta
44 Pima Arizona 23,794.31 9,187.04 980,263 1,039,073 58,810 6.00 Tucson
45 Collin Texas 2,178.76 841.22 782,341 1,005,146 222,805 28.48 McKinney
46 St. Louis Missouri 1,315.20 507.80 998,954 996,945 -2,009 -0.20 Clayton
47 Fresno California 15,431.13 5,957.99 930,450 994,400 63,950 6.87 Fresno
48 Honolulu Hawaii 1,555.92 600.74 953,207 980,080 26,873 2.82 Honolulu
49 Pinellas Florida 709.14 273.80 916,542 975,280 58,738 6.41 Clearwater
50 Westchester New York 1,114.98 430.50 949,113 967,612 18,499 1.95 White Plains
51 Marion Indiana 1,026.41 396.30 903,393 954,670 51,277 5.68 Indianapolis
52 Duval Florida 1,974.07 762.19 864,263 950,181 85,918 9.94 Jacksonville
53 Milwaukee Wisconsin 625.23 241.40 947,735 948,201 466 0.05 Milwaukee
54 Fairfield Connecticut 1,618.46 624.89 916,829 943,823 26,994 2.94 Bridgeport
55 Bergen New Jersey 603.49 233.01 905,116 936,692 31,576 3.49 Hackensack
56 Shelby Tennessee 1,976.61 763.17 927,644 935,764 8,120 0.88 Memphis
57 DuPage Illinois 848.22 327.50 916,924 928,589 11,665 1.27 Wheaton
58 Gwinnett Georgia 1,114.69 430.38 805,321 927,781 122,460 15.21 Lawrenceville
59 Erie New York 2,700.56 1,042.69 919,040 919,719 679 0.07 Buffalo
60 Prince George's Maryland 1,250.16 482.69 863,420 909,308 45,888 5.31 Upper Marlboro
61 Kern California 21,061.57 8,131.92 839,631 896,764 57,133 6.80 Bakersfield
62 Hartford Connecticut 1,903.89 735.10 894,014 892,697 -1,317 -0.15 Hartford
63 Pierce Washington 4,324.01 1,669.51 795,225 891,299 96,074 12.08 Tacoma
64 San Francisco California 121.40 46.87 805,235 883,305 78,070 9.70 San Francisco
65 Macomb Michigan 1,241.18 479.22 840,978 874,759 33,781 4.02 Mount Clemens
66 Hidalgo Texas 4,068.52 1,570.87 774,769 865,939 91,170 11.77 Edinburg
67 Denton Texas 2,275.13 878.43 662,614 859,064 196,450 29.65 Denton
68 New Haven Connecticut 1,565.66 604.51 862,477 857,620 -4,857 -0.56 New Haven
69 Ventura California 4,773.69 1,843.13 823,318 850,967 27,649 3.36 Ventura
70 El Paso Texas 2,622.86 1,012.69 800,647 840,758 40,111 5.01 El Paso
71 Worcester Massachusetts 3,912.88 1,510.77 798,552 830,839 32,287 4.04 Worcester
72 Middlesex New Jersey 800.08 308.91 809,858 829,685 19,827 2.45 New Brunswick
73 Montgomery Pennsylvania 1,251.07 483.04 799,874 828,604 28,730 3.59 Norristown
74 Baltimore Maryland 1,549.59 598.30 805,029 828,431 23,402 2.91 Towson
75 Hamilton Ohio 1,051.30 405.91 802,374 816,684 14,310 1.78 Cincinnati
76 Snohomish Washington 5,406.01 2,087.27 713,335 814,901 101,566 14.24 Everett
77 Multnomah Oregon 1,117.05 431.30 735,334 811,880 76,546 10.41 Portland
78 Suffolk Massachusetts 150.62 58.15 722,023 807,252 85,229 11.80 Boston
79 Essex New Jersey 326.89 126.21 783,969 799,767 15,798 2.02 Newark
80 Oklahoma Oklahoma 1,835.83 708.82 718,633 792,582 73,949 10.29 Oklahoma City
81 Essex Massachusetts 1,275.73 492.56 743,159 790,638 47,479 6.39 Salem and Lawrence
82 Fort Bend Texas 2,292 885 585,375 787,858 202,483 34.59 Richmond
83 Jefferson Kentucky 985.27 380.42 741,096 770,517 29,421 3.97 Louisville
84 San Mateo California 1,161.37 448.41 718,451 769,545 51,094 7.11 Redwood City
85 Cobb Georgia 879.43 339.55 688,078 756,865 68,787 10.00 Marietta
86 DeKalb Georgia 693.03 267.58 691,893 756,558 64,665 9.35 Decatur
87 Lee Florida 2,031.88 784.51 618,754 754,610 135,856 21.96 Fort Myers
88 San Joaquin California 3,603.51 1,391.32 685,306 752,660 67,354 9.83 Stockton
89 Monroe New York 1,702.15 657.21 744,344 742,474 -1,870 -0.25 Rochester
90 Denver Colorado 401.36 154.97 600,158 716,492 116,334 19.38 Denver
91 El Paso Colorado 5,508.39 2,126.80 622,263 713,856 91,593 14.72 Colorado Springs
92 Polk Florida 5,208 2,011 602,095 708,009 105,914 17.59 Bartow
93 Norfolk Massachusetts 1,025.91 396.11 670,850 705,388 34,538 5.15 Dedham
94 Washington, D.C. 177.0 68.34 601,723 702,455 100,732 16.74 N/A
95 Lake Illinois 1,149.10 443.67 703,462 700,832 -2,630 -0.37 Waukegan
96 Jackson Missouri 1,565.55 604.46 674,158 700,307 26,149 3.88 Independence and Kansas City
97 Davidson Tennessee 1,305.44 504.03 626,681 692,587 65,906 10.52 Nashville
98 Will Illinois 2,167.58 836.91 677,560 692,310 14,750 2.18 Joliet
99 Bernalillo New Mexico 3,006.53 1,160.83 662,564 678,701 16,137 2.44 Albuquerque
100 Hudson New Jersey 119.63 46.19 634,266 676,061 41,795 6.59 Jersey City

GalleryEdit

ReferencesEdit

  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).