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 |
|---|---|---|---|---|
| 1751 | Breckinridge County | Kentucky | 21,503 | 1.1% |
| 1752 | Adams County | Washington | 21,488 | 0.8% |
| 1753 | Mingo County | West Virginia | 21,455 | -1.0% |
| 1754 | Union County | Tennessee | 21,450 | 1.5% |
| 1755 | Colorado County | Texas | 21,439 | 0.0% |
| 1756 | Stutsman County | North Dakota | 21,414 | -0.1% |
| 1757 | Conway County | Arkansas | 21,393 | 0.0% |
| 1758 | Tippah County | Mississippi | 21,389 | -0.4% |
| 1759 | Dodge County | Minnesota | 21,376 | 0.4% |
| 1760 | Greene County | Georgia | 21,367 | 1.4% |
| 1761 | Washington County | Nebraska | 21,302 | 0.1% |
| 1762 | Banks County | Georgia | 21,273 | 3.7% |
| 1763 | Jones County | Iowa | 21,253 | 0.4% |
| 1764 | Dukes County | Massachusetts | 21,219 | -0.6% |
| 1765 | Taylor County | Florida | 21,210 | -2.2% |
| 1766 | Scott County | Virginia | 21,200 | -0.9% |
| 1767 | Lincoln County | Wyoming | 21,180 | 0.9% |
| 1768 | Jersey County | Illinois | 21,160 | 0.0% |
| 1769 | Brooke County | West Virginia | 21,142 | -0.7% |
| 1770 | Ogemaw County | Michigan | 21,121 | 0.4% |
| 1771 | Seward County | Kansas | 21,073 | -0.3% |
| 1772 | Jackson County | Wisconsin | 20,999 | -0.2% |
| 1773 | Spencer County | Kentucky | 20,998 | 1.4% |
| 1774 | Smith County | Tennessee | 20,981 | 0.9% |
| 1775 | Newton County | Mississippi | 20,960 | -0.4% |
| 1776 | Lamar County | Georgia | 20,941 | 1.5% |
| 1777 | Clark County | Arkansas | 20,938 | -0.1% |
| 1778 | Pike County | Georgia | 20,932 | 0.7% |
| 1779 | Gray County | Texas | 20,919 | -0.1% |
| 1780 | Buchanan County | Iowa | 20,883 | 0.8% |
| 1781 | Grenada County | Mississippi | 20,868 | -0.2% |
| 1782 | Jones County | Texas | 20,861 | 0.3% |
| 1783 | Duchesne County | Utah | 20,856 | 0.9% |
| 1784 | Chaffee County | Colorado | 20,831 | 0.2% |
| 1784 | Sullivan County | Indiana | 20,831 | 0.7% |
| 1786 | Freestone County | Texas | 20,811 | 0.6% |
| 1787 | Fayette County | Illinois | 20,790 | -0.8% |
| 1788 | Simpson County | Kentucky | 20,788 | 1.8% |
| 1789 | Pierce County | Georgia | 20,764 | 0.8% |
| 1790 | Kewaunee County | Wisconsin | 20,758 | -0.1% |
| 1791 | Uinta County | Wyoming | 20,728 | 0.4% |
| 1792 | Greene County | North Carolina | 20,700 | 0.0% |
| 1793 | Carbon County | Utah | 20,680 | 0.4% |
| 1794 | Carroll County | Indiana | 20,655 | -0.3% |
| 1795 | Logan County | Colorado | 20,654 | -0.2% |
| 1796 | Barnwell County | South Carolina | 20,653 | 0.7% |
| 1797 | Lavaca County | Texas | 20,651 | 0.6% |
| 1798 | Shelby County | Illinois | 20,576 | 0.1% |
| 1799 | Union Parish | Louisiana | 20,561 | -1.0% |
| 1800 | Burleson County | Texas | 20,549 | 2.2% |
3144 ranked entries.