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 |
|---|---|---|---|---|
| 551 | Wayne County | Ohio | 116,758 | 0.2% |
| 552 | St. Mary's County | Maryland | 116,692 | 0.4% |
| 553 | Androscoggin County | Maine | 116,487 | 0.8% |
| 554 | Hanover County | Virginia | 116,423 | 0.8% |
| 555 | Madison County | Mississippi | 116,298 | 1.2% |
| 556 | Cass County | Missouri | 115,859 | 1.7% |
| 557 | Calhoun County | Alabama | 115,834 | -0.4% |
| 558 | Bradley County | Tennessee | 115,465 | 1.2% |
| 559 | Flathead County | Montana | 115,429 | 0.9% |
| 560 | Cowlitz County | Washington | 114,885 | 1.0% |
| 561 | Northwest Hills Planning Region | Connecticut | 114,690 | 0.4% |
| 562 | Potter County | Texas | 114,453 | -0.1% |
| 563 | Platte County | Missouri | 114,400 | 1.2% |
| 564 | Carver County | Minnesota | 114,379 | 1.6% |
| 565 | Lancaster County | South Carolina | 114,296 | 2.7% |
| 566 | Hardin County | Kentucky | 113,482 | 0.7% |
| 567 | Ontario County | New York | 113,130 | 0.4% |
| 568 | Delaware County | Indiana | 113,106 | 0.3% |
| 569 | Warren County | New Jersey | 112,953 | 0.5% |
| 570 | Walton County | Georgia | 112,696 | 2.2% |
| 571 | Miami County | Ohio | 112,634 | 0.7% |
| 572 | Lycoming County | Pennsylvania | 112,587 | -0.3% |
| 573 | Douglas County | Oregon | 111,951 | -0.4% |
| 574 | Jefferson County | New York | 111,540 | -1.1% |
| 575 | LaPorte County | Indiana | 111,294 | 0.0% |
| 576 | Highlands County | Florida | 111,122 | 1.1% |
| 577 | Moore County | North Carolina | 110,619 | 2.1% |
| 578 | Houston County | Alabama | 110,318 | 0.6% |
| 579 | Yamhill County | Oregon | 110,024 | 0.0% |
| 580 | Navajo County | Arizona | 109,946 | 0.3% |
| 581 | Eaton County | Michigan | 109,581 | 0.4% |
| 582 | Eau Claire County | Wisconsin | 109,033 | 0.4% |
| 583 | Franklin County | Missouri | 108,090 | 0.7% |
| 584 | Monongalia County | West Virginia | 107,991 | 0.1% |
| 585 | Mercer County | Pennsylvania | 107,860 | -0.3% |
| 586 | LaSalle County | Illinois | 107,773 | -0.1% |
| 587 | Adams County | Pennsylvania | 107,594 | 0.4% |
| 588 | Cecil County | Maryland | 107,131 | 0.5% |
| 589 | Wicomico County | Maryland | 106,899 | 0.2% |
| 590 | Nassau County | Florida | 106,879 | 2.3% |
| 591 | Woodbury County | Iowa | 106,649 | -0.1% |
| 592 | Vigo County | Indiana | 106,512 | 0.3% |
| 593 | Whitfield County | Georgia | 106,212 | 0.6% |
| 594 | Walworth County | Wisconsin | 106,127 | 0.0% |
| 595 | Grant County | Washington | 105,727 | 0.9% |
| 596 | Kankakee County | Illinois | 105,525 | -0.3% |
| 597 | St. Lawrence County | New York | 105,488 | -0.6% |
| 598 | Sumter County | South Carolina | 105,067 | 0.3% |
| 599 | Craven County | North Carolina | 105,025 | 0.8% |
| 600 | Daviess County | Kentucky | 104,898 | 0.6% |
3144 ranked entries.