Largest Counties

The 100 Largest U.S. Counties
-- Based on Census 2000 Population
-- Based on Population Change from 1990 to 2000

Data presented in this section show the largest 100 U.S. counties based on Census 2000 population (Table 1) and the largest 100 U.S. counties based on total population change from 1990 to 2000 (Table 2). All 3,141 counties in the U.S. were included in these rankings as identified by the Census Bureau as counties for Census 2000. See ranking of largest 100 U.S. cities/places based on Census 2000 at http://proximityone.com/plc100.htm. See ranking of largest 200 U.S. school districts based on Census 2000 via the web page http://proximityone.com/plsd.htm.

The total population of counties in Census 2000 was 206,462,567. The total population of the largest 100 counties was 119,305,672 (42.39 percent of the total population).

Table 1. Largest 100 U.S. Counties based on Census 2000 Total Population
Rank County Name Code Population

1 Los Angeles County, CA 06037 9,519,338

2 Cook County, IL 17031 5,376,741

3 Harris County, TX 48201 3,400,578

4 Maricopa County, AZ 04013 3,072,149

5 Orange County, CA 06059 2,846,289

6 San Diego County, CA 06073 2,813,833

7 Kings County, NY 36047 2,465,326

8 Miami-Dade County, FL 12086 2,253,362

9 Queens County, NY 36081 2,229,379

10 Dallas County, TX 48113 2,218,899

11 Wayne County, MI 26163 2,061,162

12 King County, WA 53033 1,737,034

13 San Bernardino County, CA 06071 1,709,434

14 Santa Clara County, CA 06085 1,682,585

15 Broward County, FL 12011 1,623,018

16 Riverside County, CA 06065 1,545,387

17 New York County, NY 36061 1,537,195

18 Philadelphia County, PA 42101 1,517,550

19 Middlesex County, MA 25017 1,465,396

20 Tarrant County, TX 48439 1,446,219

21 Alameda County, CA 06001 1,443,741

22 Suffolk County, NY 36103 1,419,369

23 Cuyahoga County, OH 39035 1,393,978

24 Bexar County, TX 48029 1,392,931

25 Clark County, NV 32003 1,375,765

26 Nassau County, NY 36059 1,334,544

27 Bronx County, NY 36005 1,332,650

28 Allegheny County, PA 42003 1,281,666

29 Sacramento County, CA 06067 1,223,499

30 Oakland County, MI 26125 1,194,156

31 Palm Beach County, FL 12099 1,131,184

32 Hennepin County, MN 27053 1,116,200

33 Franklin County, OH 39049 1,068,978

34 St. Louis County, MO 29189 1,016,315

35 Hillsborough County, FL 12057 998,948

36 Fairfax County, VA 51059 969,749

37 Erie County, NY 36029 950,265

38 Contra Costa County, CA 06013 948,816

39 Milwaukee County, WI 55079 940,164

40 Westchester County, NY 36119 923,459

41 Pinellas County, FL 12103 921,482

42 DuPage County, IL 17043 904,161

43 Salt Lake County, UT 49035 898,387

44 Shelby County, TN 47157 897,472

45 Orange County, FL 12095 896,344

46 Bergen County, NJ 34003 884,118

47 Fairfield County, CT 09001 882,567

48 Honolulu County, HI 15003 876,156

49 Montgomery County, MD 24031 873,341

50 Marion County, IN 18097 860,454

51 Hartford County, CT 09003 857,183

52 Hamilton County, OH 39061 845,303

53 Pima County, AZ 04019 843,746

54 New Haven County, CT 09009 824,008

55 Fulton County, GA 13121 816,006

56 Travis County, TX 48453 812,280

57 Prince George's County, MD 24033 801,515

58 Fresno County, CA 06019 799,407

59 Essex County, NJ 34013 793,633

60 Macomb County, MI 26099 788,149

61 Duval County, FL 12031 778,879

62 San Francisco County, CA 06075 776,733

63 Baltimore County, MD 24005 754,292

64 Ventura County, CA 06111 753,197

65 Worcester County, MA 25027 750,963

66 Middlesex County, NJ 34023 750,162

67 Montgomery County, PA 42091 750,097

68 Monroe County, NY 36055 735,343

69 Essex County, MA 25009 723,419

70 San Mateo County, CA 06081 707,161

71 Pierce County, WA 53053 700,820

72 Mecklenburg County, NC 37119 695,454

73 Jefferson County, KY 21111 693,604

74 Suffolk County, MA 25025 689,807

75 El Paso County, TX 48141 679,622

76 DeKalb County, GA 13089 665,865

77 Jefferson County, AL 01073 662,047

78 Kern County, CA 06029 661,645

79 Multnomah County, OR 41051 660,486

80 Oklahoma County, OK 40109 660,448

81 Jackson County, MO 29095 654,880

82 Baltimore city, MD 24510 651,154

83 Norfolk County, MA 25021 650,308

84 Lake County, IL 17097 644,356

85 Wake County, NC 37183 627,846

86 Providence County, RI 44007 621,602

87 Monmouth County, NJ 34025 615,301

88 Hudson County, NJ 34017 608,975

89 Cobb County, GA 13067 607,751

90 Snohomish County, WA 53061 606,024

91 Bucks County, PA 42017 597,635

92 Gwinnett County, GA 13135 588,448

93 Kent County, MI 26081 574,335

94 District of Columbia DC 11001 572,059

95 Davidson County, TN 47037 569,891

96 Hidalgo County, TX 48215 569,463

97 San Joaquin County, CA 06077 563,598

98 Tulsa County, OK 40143 563,299

99 Montgomery County, OH 39113 559,062

100 Bernalillo County, NM 35001 556,678

Source: Proximity; based on the 1990 Census and Census 2000; U.S. Bureau of the Census.

Table 2. Largest 100 U.S. Counties based on Population Change from 1990 to 2000
Rank County Name Code 1990 Population 2000 Population 1990-2000 Population Change 1990-2000 Population Percent Change

1 Maricopa County, AZ 04013 2,122,101 3,072,149 950,048 44.77

2 Los Angeles County, CA 06037 8,863,164 9,519,338 656,174 7.40

3 Clark County, NV 32003 741,459 1,375,765 634,306 85.55

4 Harris County, TX 48201 2,818,199 3,400,578 582,379 20.66

5 Orange County, CA 06059 2,410,556 2,846,289 435,733 18.08

6 Riverside County, CA 06065 1,170,413 1,545,387 374,974 32.04

7 Broward County, FL 12011 1,255,488 1,623,018 367,530 29.27

8 Dallas County, TX 48113 1,852,810 2,218,899 366,089 19.76

9 San Diego County, CA 06073 2,498,016 2,813,833 315,817 12.64

10 San Bernardino County, CA 06071 1,418,380 1,709,434 291,054 20.52

11 Queens County, NY 36081 1,951,598 2,229,379 277,781 14.23

12 Tarrant County, TX 48439 1,170,103 1,446,219 276,116 23.60

13 Cook County, IL 17031 5,105,067 5,376,741 271,674 5.32

14 Palm Beach County, FL 12099 863,518 1,131,184 267,666 31.00

15 Travis County, TX 48453 576,407 812,280 235,873 40.92

16 Gwinnett County, GA 13135 352,910 588,448 235,538 66.74

17 King County, WA 53033 1,507,319 1,737,034 229,715 15.24

18 Collin County, TX 48085 264,036 491,675 227,639 86.22

19 Orange County, FL 12095 677,491 896,344 218,853 32.30

20 Bexar County, TX 48029 1,185,394 1,392,931 207,537 17.51

21 Wake County, NC 37183 423,380 627,846 204,466 48.29

22 Hidalgo County, TX 48215 383,545 569,463 185,918 48.47

23 Santa Clara County, CA 06085 1,497,577 1,682,585 185,008 12.35

24 Mecklenburg County, NC 37119 511,433 695,454 184,021 35.98

25 Sacramento County, CA 06067 1,041,219 1,223,499 182,280 17.51

26 Pima County, AZ 04019 666,880 843,746 176,866 26.52

27 Salt Lake County, UT 49035 725,956 898,387 172,431 23.75

28 Fulton County, GA 13121 648,951 816,006 167,055 25.74

29 Hillsborough County, FL 12057 834,054 998,948 164,894 19.77

30 Kings County, NY 36047 2,300,664 2,465,326 164,662 7.16

31 Alameda County, CA 06001 1,279,182 1,443,741 164,559 12.86

32 Cobb County, GA 13067 447,745 607,751 160,006 35.74

33 Denton County, TX 48121 273,525 432,976 159,451 58.29

34 Fairfax County, VA 51059 818,584 969,749 151,165 18.47

35 Contra Costa County, CA 06013 803,732 948,816 145,084 18.05

36 Will County, IL 17197 357,313 502,266 144,953 40.57

37 Snohomish County, WA 53061 465,642 606,024 140,382 30.15

38 Washington County, OR 41067 311,554 445,342 133,788 42.94

39 Fresno County, CA 06019 667,490 799,407 131,917 19.76

40 Fort Bend County, TX 48157 225,421 354,452 129,031 57.24

41 Bronx County, NY 36005 1,203,789 1,332,650 128,861 10.70

42 Lake County, IL 17097 516,418 644,356 127,938 24.77

43 DuPage County, IL 17043 781,666 904,161 122,495 15.67

44 DeKalb County, GA 13089 545,837 665,865 120,028 21.99

45 El Paso County, CO 08041 397,014 516,929 119,915 30.20

46 Kern County, CA 06029 543,477 661,645 118,168 21.74

47 Montgomery County, MD 24031 757,027 873,341 116,314 15.36

48 Douglas County, CO 08035 60,391 175,766 115,375 191.05

49 Pierce County, WA 53053 586,203 700,820 114,617 19.55

50 Montgomery County, TX 48339 182,201 293,768 111,567 61.23

51 Oakland County, MI 26125 1,083,592 1,194,156 110,564 10.20

52 Williamson County, TX 48491 139,551 249,967 110,416 79.12

53 Franklin County, OH 39049 961,437 1,068,978 107,541 11.19

54 Clark County, WA 53011 238,053 345,238 107,185 45.03

55 Duval County, FL 12031 672,971 778,879 105,908 15.74

56 Lee County, FL 12071 335,113 440,888 105,775 31.56

57 Utah County, UT 49049 263,590 368,536 104,946 39.81

58 Collier County, FL 12021 152,099 251,377 99,278 65.27

59 Adams County, CO 08001 265,038 363,857 98,819 37.28

60 Suffolk County, NY 36103 1,321,864 1,419,369 97,505 7.38

61 Arapahoe County, CO 08005 391,511 487,967 96,456 24.64

62 Johnson County, KS 20091 355,054 451,086 96,032 27.05

63 Ada County, ID 16001 205,775 300,904 95,129 46.23

64 Jefferson County, CO 08059 438,430 527,056 88,626 20.21

65 El Paso County, TX 48141 591,610 679,622 88,012 14.88

66 Denver County, CO 08031 467,610 554,636 87,026 18.61

67 Kane County, IL 17089 317,471 404,119 86,648 27.29

68 Washoe County, NV 32031 254,667 339,486 84,819 33.31

69 Ventura County, CA 06111 669,016 753,197 84,181 12.58

70 Hennepin County, MN 27053 1,032,431 1,116,200 83,769 8.11

71 Loudoun County, VA 51107 86,129 169,599 83,470 96.91

72 San Joaquin County, CA 06077 480,628 563,598 82,970 17.26

73 Dakota County, MN 27037 275,227 355,904 80,677 29.31

74 Polk County, FL 12105 405,382 483,924 78,542 19.37

75 Middlesex County, NJ 34023 671,780 750,162 78,382 11.67

76 Ocean County, NJ 34029 433,203 510,916 77,713 17.94

77 Seminole County, FL 12117 287,529 365,196 77,667 27.01

78 Brevard County, FL 12009 398,978 476,230 77,252 19.36

79 McHenry County, IL 17111 183,241 260,077 76,836 41.93

80 Multnomah County, OR 41051 583,887 660,486 76,599 13.12

81 Stanislaus County, CA 06099 370,522 446,997 76,475 20.64

82 Bernalillo County, NM 35001 480,577 556,678 76,101 15.84

83 Placer County, CA 06061 172,796 248,399 75,603 43.75

84 Cameron County, TX 48061 260,120 335,227 75,107 28.87

85 Hamilton County, IN 18057 108,936 182,740 73,804 67.75

86 Kent County, MI 26081 500,631 574,335 73,704 14.72

87 Guilford County, NC 37081 347,420 421,048 73,628 21.19

88 Volusia County, FL 12127 370,712 443,343 72,631 19.59

89 Prince George's County, MD 24033 729,268 801,515 72,247 9.91

90 Montgomery County, PA 42091 678,111 750,097 71,986 10.62

91 Shelby County, TN 47157 826,330 897,472 71,142 8.61

92 St. Charles County, MO 29183 212,907 283,883 70,976 33.34

93 Macomb County, MI 26099 717,400 788,149 70,749 9.86

94 Sonoma County, CA 06097 388,222 458,614 70,392 18.13

95 Pinellas County, FL 12103 851,659 921,482 69,823 8.20

96 Middlesex County, MA 25017 1,398,468 1,465,396 66,928 4.79

97 Boulder County, CO 08013 225,339 291,288 65,949 29.27

98 Larimer County, CO 08069 186,136 251,494 65,358 35.11

99 Prince William County, VA 51153 215,686 280,813 65,127 30.20

100 Osceola County, FL 12097 107,728 172,493 64,765 60.12

Source: Proximity; based on the 1990 Census and Census 2000; U.S. Bureau of the Census.

[goto top]