Demographia

US Counties Over 250,000:
1940 Ranked

Rank County State 1999 1940
1 Cook County Illinois 5,192,326 4,063,342
2 Los Angeles County California 9,329,989 2,785,643
3 Kings County New York 2,268,297 2,698,285
4 Wayne County Michigan 2,106,495 2,015,623
5 Philadelphia County Pennsylvania 1,417,601 1,931,334
6 New York County New York 1,551,844 1,889,924
7 Allegheny County Pennsylvania 1,256,806 1,411,539
8 Bronx County New York 1,194,099 1,394,711
9 Queens County New York 2,000,642 1,297,634
10 Cuyahoga County Ohio 1,371,717 1,217,250
11 Middlesex County Massachusetts 1,426,606 971,390
12 Suffolk County Massachusetts 641,695 863,248
13 Baltimore city Maryland 632,681 859,100
14 Essex County New Jersey 747,355 837,340
15 St. Louis city Missouri 333,960 816,048
16 Erie County New York 925,957 798,377
17 Milwaukee County Wisconsin 906,248 766,885
18 Washington DC 519,000 663,091
19 Hudson County New Jersey 552,819 652,040
20 San Francisco County California 746,777 634,536
21 Hamilton County Ohio 840,443 621,987
22 Westchester County New York 905,572 573,558
23 Hennepin County Minnesota 1,064,419 568,899
24 Providence Rhode Island 574,108 550,298
25 Harris County Texas 3,250,404 528,961
26 Alameda County California 1,415,582 513,011
27 King County Washington 1,664,846 504,980
28 Worcester County Massachusetts 738,629 504,470
29 Essex County Massachusetts 704,407 496,313
30 Orleans Parish Louisiana 460,913 494,537
31 New Haven County Connecticut 793,208 484,316
32 Jackson County Missouri 654,484 477,828
33 Marion County Indiana 810,946 460,926
34 Jefferson County Alabama 657,422 459,930
35 Hartford County Connecticut 829,671 450,189
36 Luzerne County Pennsylvania 312,000 441,518
37 Monroe County New York 712,419 438,230
38 Fairfield County Connecticut 841,334 418,384
39 Bergen County New Jersey 857,052 409,646
40 Nassau County New York 1,305,057 406,748
41 Dallas County Texas 2,062,100 398,564
42 Fulton County Georgia 744,827 392,886
43 Franklin County Ohio 1,027,821 388,712
44 Jefferson County Kentucky 672,900 385,392
45 Bristol County Massachusetts 520,258 364,637
46 Shelby County Tennessee 873,000 358,250
47 Multnomah County Oregon 633,224 355,099
48 Lucas County Ohio 446,482 344,333
49 Summit County Ohio 537,856 339,405
50 Bexar County Texas 1,372,867 338,176
51 Hampden County Massachusetts 438,279 332,107
52 Union County New Jersey 498,759 328,344
53 Norfolk County Massachusetts 643,580 325,180
54 Denver County Colorado 499,775 322,412
55 Delaware County Pennsylvania 541,502 310,756
56 Ramsey County Minnesota 486,254 309,935
57 Passaic County New Jersey 485,064 309,353
58 Westmoreland County Pennsylvania 370,658 303,411
59 Lackawanna County Pennsylvania 206,520 301,243
60 Montgomery County Ohio 565,866 295,480
61 Onondaga County New York 456,215 295,108
62 Lake County Indiana 480,619 293,195
63 San Diego County California 2,820,844 289,348
64 Montgomery County Pennsylvania 724,087 289,247
65 St. Louis County Missouri 996,181 274,230
66 Miami-Dade County Florida 2,175,634 267,739
67 Honolulu County Hawaii 864,571 257,696
68 Davidson County Tennessee 530,050 257,267
69 Camden County New Jersey 503,093 255,727
70 Oakland County Michigan 1,179,978 254,068

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