Largest counties by population
Rank US counties and county equivalents by resident population, not land area.
U.S. Census Bureau Population EstimatesPeriod: July 1, 2024–July 1, 2025 · Vintage 2025Retrieved 2026-10-05T08:10:35+00:00
July 1 resident population estimates from a single Census vintage. Counties are ranked by population, not land area. County equivalents include independent cities and other Census county-equivalent areas.
Ranks are competition ranks computed across the full filtered set.
| Rank | Name | State | Population | Growth |
|---|---|---|---|---|
| 51 | Capitol Planning Region | Connecticut | 994,115 | 0.5% |
| 52 | Marion County | Indiana | 992,196 | 0.2% |
| 53 | St. Louis County | Missouri | 990,911 | -0.1% |
| 54 | Honolulu County | Hawaii | 988,703 | -0.1% |
| 55 | Bergen County | New Jersey | 977,026 | 0.4% |
| 56 | Fort Bend County | Texas | 975,191 | 2.5% |
| 57 | Prince George's County | Maryland | 970,374 | 0.6% |
| 58 | Pinellas County | Florida | 948,563 | -1.2% |
| 59 | Erie County | New York | 946,741 | -0.1% |
| 60 | Pierce County | Washington | 946,288 | 0.7% |
| 61 | DuPage County | Illinois | 934,298 | 0.2% |
| 62 | Kern County | California | 927,068 | 0.3% |
| 63 | Milwaukee County | Wisconsin | 924,216 | 0.0% |
| 64 | Hidalgo County | Texas | 921,549 | 0.9% |
| 65 | Shelby County | Tennessee | 910,226 | -0.6% |
| 66 | Essex County | New Jersey | 896,379 | 0.6% |
| 67 | Worcester County | Massachusetts | 888,502 | 0.5% |
| 68 | Macomb County | Michigan | 886,221 | 0.4% |
| 69 | Middlesex County | New Jersey | 883,335 | 0.2% |
| 70 | El Paso County | Texas | 877,858 | -0.2% |
| 71 | Montgomery County | Pennsylvania | 877,643 | 0.3% |
| 72 | Lee County | Florida | 875,607 | 1.6% |
| 73 | Polk County | Florida | 874,790 | 2.7% |
| 74 | Snohomish County | Washington | 870,656 | 1.1% |
| 75 | Baltimore County | Maryland | 847,650 | -0.1% |
| 76 | Hamilton County | Ohio | 838,418 | 0.1% |
| 77 | Ventura County | California | 830,851 | -0.3% |
| 78 | Essex County | Massachusetts | 826,653 | 0.1% |
| 79 | San Francisco County | California | 826,079 | 0.6% |
| 80 | San Joaquin County | California | 823,815 | 0.8% |
| 81 | Oklahoma County | Oklahoma | 822,125 | 0.5% |
| 82 | Multnomah County | Oregon | 795,391 | 0.1% |
| 83 | Jefferson County | Kentucky | 795,222 | 0.1% |
| 84 | Cobb County | Georgia | 793,345 | 0.6% |
| 85 | Suffolk County | Massachusetts | 791,891 | -0.2% |
| 86 | Montgomery County | Texas | 781,194 | 4.0% |
| 87 | DeKalb County | Georgia | 774,394 | 0.2% |
| 88 | Utah County | Utah | 759,859 | 1.9% |
| 89 | El Paso County | Colorado | 757,040 | 0.6% |
| 90 | Williamson County | Texas | 752,827 | 3.3% |
| 91 | Monroe County | New York | 750,506 | 0.0% |
| 92 | Davidson County | Tennessee | 745,904 | 1.3% |
| 93 | San Mateo County | California | 743,568 | 0.4% |
| 94 | Denver County | Colorado | 740,613 | -0.1% |
| 95 | Norfolk County | Massachusetts | 739,749 | 0.3% |
| 96 | Hudson County | New Jersey | 735,033 | 0.5% |
| 97 | Jackson County | Missouri | 732,994 | 0.5% |
| 98 | Lake County | Illinois | 719,339 | 0.1% |
| 99 | Will County | Illinois | 712,253 | 0.5% |
| 100 | Tulsa County | Oklahoma | 698,782 | 0.6% |
3144 ranked entries.