Demographia

US Counties Over 250,000:
1920 Ranked

Rank County State 1999 1920
1 Cook County Illinois 5,192,326 3,053,017
2 New York County New York 1,551,844 2,284,103
3 Kings County New York 2,268,297 2,018,356
4 Philadelphia County Pennsylvania 1,417,601 1,823,779
5 Allegheny County Pennsylvania 1,256,806 1,185,808
6 Wayne County Michigan 2,106,495 1,177,645
7 Cuyahoga County Ohio 1,371,717 943,495
8 Los Angeles County California 9,329,989 936,455
9 Suffolk County Massachusetts 641,695 835,522
10 Middlesex County Massachusetts 1,426,606 778,352
11 St. Louis city Missouri 333,960 772,897
12 Baltimore city Maryland 632,681 733,826
13 Bronx County New York 1,194,099 732,016
14 Essex County New Jersey 747,355 652,089
15 Erie County New York 925,957 634,688
16 Hudson County New Jersey 552,819 629,154
17 Milwaukee County Wisconsin 906,248 539,449
18 San Francisco County California 746,777 506,676
19 Hamilton County Ohio 840,443 493,678
20 Essex County Massachusetts 704,407 482,156
21 Providence Rhode Island 574,108 475,190
22 Queens County New York 2,000,642 469,042
23 Worcester County Massachusetts 738,629 455,135
24 Washington DC 519,000 437,571
25 Hennepin County Minnesota 1,064,419 415,419
26 New Haven County Connecticut 793,208 415,214
27 Luzerne County Pennsylvania 312,000 390,991
28 King County Washington 1,664,846 389,273
29 Orleans Parish Louisiana 460,913 387,219
30 Jackson County Missouri 654,484 367,846
31 Bristol County Massachusetts 520,258 359,005
32 Monroe County New York 712,419 352,034
33 Marion County Indiana 810,946 348,061
34 Westchester County New York 905,572 344,436
35 Alameda County California 1,415,582 344,177
36 Hartford County Connecticut 829,671 336,027
37 Fairfield County Connecticut 841,334 320,936
38 Jefferson County Alabama 657,422 310,054
39 Hampden County Massachusetts 438,279 300,305
40 Jefferson County Kentucky 672,900 286,369
41 Lackawanna County Pennsylvania 206,520 286,311
42 Summit County Ohio 537,856 286,065
43 Franklin County Ohio 1,027,821 283,951
44 Multnomah County Oregon 633,224 275,898
45 Lucas County Ohio 446,482 275,721
46 Westmoreland County Pennsylvania 370,658 273,568
47 Passaic County New Jersey 485,064 259,174
48 Denver County Colorado 499,775 256,491

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