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Largest Counties by Population

The 38 Largest Counties With a Population Above One Million

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Below is a listing of the 38 largest counties (those over one million in population) in the United States, based on mid-year 2005 population estimates from the U.S. Census Bureau...

1. Los Angeles County, CA - 9,935,475
2. Cook County, IL - 5,303,683
3. Harris County, TX - 3,693,050
4. Maricopa County, AZ - 3,635,528
5. Orange County, CA - 2,988,072
6. San Diego County, CA - 2,933,462
7. Kings County, NY - 2,486,235
8. Miami-Dade County, FL - 2,376,014
9. Dallas County, TX - 2,305,454
10. Queens County, NY - 2,241,600
11. Wayne County, MI - 1,998,217
12. San Bernardino County, CA - 1,963,535
13. Riverside County, CA - 1,946,419
14. King County, WA - 1,793,583
15. Broward County, FL - 1,777,638
16. Clark County, NV - 1,710,551
17. Santa Clara County, CA - 1,699,052
18. Tarrant County, TX - 1,620,479
19. New York County, NY - 1,593,200
20. Bexar County, TX - 1,518,370
21. Suffolk County, NY - 1,474,927
22. Philadelphia County, PA - 1,463,281
23. Middlesex County, MA - 1,459,011
24. Alameda County, CA - 1,448,905
25. Sacramento County, CA - 1,363,482
26. Bronx County, NY - 1,357,589
27. Cuyahoga County, OH - 1,335,317
28. Nassau County, NY - 1,333,137
29. Palm Beach County, FL - 1,268,548
30. Allegheny County, PA - 1,235,841
31. Oakland County, MI - 1,214,361
32. Hillsborough County, FL - 1,132,152
33. Hennepin County, MN - 1,119,364
34. Franklin County, OH - 1,090,771
35. Orange County, FL - 1,023,023
36. Contra Costa County, CA - 1,017,787
37. Fairfax County, VA - 1,006,529
38. St. Louis County, MO - 1,004,666

 

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