Fastest-growing counties in the US
Compare annual population growth in US counties and county equivalents.
U.S. Census Bureau Population EstimatesPeriod: July 1, 2024–July 1, 2025 · Vintage 2025Retrieved 2026-10-05T08:10:35+00:00
Percent change = (current July 1 population − previous July 1 population) / previous population × 100. Both estimates use the same Census vintage. Includes counties and county equivalents with at least 20,000 residents in the previous year. This is observed population change, not a forecast.
Ranks are competition ranks computed across the full filtered set.
| Rank | Name | State | Growth | Population |
|---|---|---|---|---|
| 1801 | Buena Vista County | Iowa | -1.0% | 20,449 |
| 1802 | Fayette County | West Virginia | -1.0% | 38,165 |
| 1803 | Maui County | Hawaii | -1.0% | 160,592 |
| 1804 | Avoyelles Parish | Louisiana | -1.0% | 37,941 |
| 1805 | Franklin County | New York | -1.0% | 46,500 |
| 1806 | Wyoming County | West Virginia | -1.0% | 19,801 |
| 1807 | Mingo County | West Virginia | -1.0% | 21,455 |
| 1808 | Sumter County | Georgia | -1.0% | 28,801 |
| 1809 | Perry County | Illinois | -1.1% | 20,160 |
| 1810 | Iberia Parish | Louisiana | -1.1% | 66,846 |
| 1811 | Jefferson County | New York | -1.1% | 111,540 |
| 1812 | Siskiyou County | California | -1.1% | 42,013 |
| 1813 | Pike County | Kentucky | -1.2% | 54,721 |
| 1814 | Ohio County | West Virginia | -1.2% | 40,496 |
| 1815 | Pinellas County | Florida | -1.2% | 948,563 |
| 1816 | Crittenden County | Arkansas | -1.2% | 46,210 |
| 1817 | Dallas County | Alabama | -1.2% | 35,140 |
| 1818 | Letcher County | Kentucky | -1.3% | 19,952 |
| 1819 | Harlan County | Kentucky | -1.3% | 24,725 |
| 1820 | Assumption Parish | Louisiana | -1.5% | 19,720 |
| 1821 | Curry County | New Mexico | -1.5% | 46,655 |
| 1822 | Lassen County | California | -1.7% | 28,117 |
| 1823 | Leflore County | Mississippi | -1.8% | 25,686 |
| 1824 | Christian County | Kentucky | -1.8% | 70,115 |
| 1825 | Washington County | Mississippi | -1.9% | 40,446 |
| 1826 | Tuolumne County | California | -1.9% | 53,160 |
| 1827 | Monroe County | Florida | -2.0% | 80,406 |
| 1828 | Del Norte County | California | -2.0% | 26,410 |
| 1829 | Vernon Parish | Louisiana | -2.1% | 45,091 |
| 1830 | Taylor County | Florida | -2.2% | 21,210 |
1830 ranked entries.