Demographia

US Counties Over 250,000:
1910 Ranked

Rank County State 1999 1910
1 New York County New York 1,551,844 2,762,522
2 Cook County Illinois 5,192,326 2,405,233
3 Kings County New York 2,268,297 1,634,351
4 Philadelphia County Pennsylvania 1,417,601 1,549,008
5 Allegheny County Pennsylvania 1,256,806 1,018,463
6 Suffolk County Massachusetts 641,695 731,388
7 St. Louis city Missouri 333,960 687,029
8 Middlesex County Massachusetts 1,426,606 669,915
9 Cuyahoga County Ohio 1,371,717 637,425
10 Baltimore city Maryland 632,681 558,485
11 Hudson County New Jersey 552,819 537,231
12 Wayne County Michigan 2,106,495 531,591
13 Erie County New York 925,957 528,985
14 Essex County New Jersey 747,355 512,886
15 Los Angeles County California 9,329,989 504,131
16 Hamilton County Ohio 840,443 460,732
17 Essex County Massachusetts 704,407 436,477
18 Milwaukee County Wisconsin 906,248 433,187
19 Providence Rhode Island 574,108 424,353
20 San Francisco County California 746,777 416,912
21 Worcester County Massachusetts 738,629 399,657
22 Luzerne County Pennsylvania 312,000 343,186
23 Orleans Parish Louisiana 460,913 339,075
24 New Haven County Connecticut 793,208 337,282
25 Hennepin County Minnesota 1,064,419 333,480
26 Washington DC 519,000 331,069
27 Bristol County Massachusetts 520,258 318,573
28 King County Washington 1,664,846 284,638
29 Queens County New York 2,000,642 284,041
30 Jackson County Missouri 654,484 283,522
31 Monroe County New York 712,419 283,212
32 Westchester County New York 905,572 283,055
33 Marion County Indiana 810,946 263,661
34 Jefferson County Kentucky 672,900 262,920
35 Lackawanna County Pennsylvania 206,520 259,570
36 Hartford County Connecticut 829,671 250,182

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