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 |
|---|---|---|---|---|
| 1501 | Niagara County | New York | -0.2% | 208,912 |
| 1502 | Dale County | Alabama | -0.2% | 49,912 |
| 1503 | Wythe County | Virginia | -0.2% | 27,983 |
| 1504 | St. John the Baptist Parish | Louisiana | -0.2% | 39,875 |
| 1505 | Erie County | Pennsylvania | -0.2% | 265,832 |
| 1506 | Woodford County | Illinois | -0.2% | 38,111 |
| 1507 | Richmond County | North Carolina | -0.2% | 42,041 |
| 1508 | Roanoke County | Virginia | -0.2% | 97,150 |
| 1509 | Santa Barbara County | California | -0.2% | 442,065 |
| 1510 | Nevada County | California | -0.2% | 101,911 |
| 1511 | Lincoln County | Oregon | -0.2% | 50,636 |
| 1512 | Gregg County | Texas | -0.2% | 126,095 |
| 1513 | El Paso County | Texas | -0.2% | 877,858 |
| 1514 | Jefferson Parish | Louisiana | -0.2% | 431,398 |
| 1515 | Osceola County | Michigan | -0.2% | 23,516 |
| 1516 | Amador County | California | -0.2% | 41,876 |
| 1517 | Mason County | West Virginia | -0.2% | 24,707 |
| 1518 | Grenada County | Mississippi | -0.2% | 20,868 |
| 1519 | Cass County | Indiana | -0.2% | 37,836 |
| 1520 | Watauga County | North Carolina | -0.2% | 54,786 |
| 1521 | DeWitt County | Texas | -0.3% | 20,309 |
| 1522 | Herkimer County | New York | -0.3% | 59,219 |
| 1523 | Wayne County | Indiana | -0.3% | 66,169 |
| 1524 | Summit County | Utah | -0.3% | 43,141 |
| 1525 | Saline County | Illinois | -0.3% | 22,772 |
| 1526 | Wyoming County | Pennsylvania | -0.3% | 25,790 |
| 1527 | Santa Fe County | New Mexico | -0.3% | 156,907 |
| 1528 | Wood County | Wisconsin | -0.3% | 74,060 |
| 1529 | Lyon County | Kansas | -0.3% | 32,266 |
| 1530 | Bremer County | Iowa | -0.3% | 25,296 |
| 1531 | McCracken County | Kentucky | -0.3% | 67,553 |
| 1532 | Natchitoches Parish | Louisiana | -0.3% | 36,089 |
| 1533 | St. Clair County | Illinois | -0.3% | 250,708 |
| 1534 | Carroll County | Indiana | -0.3% | 20,655 |
| 1535 | Sumner County | Kansas | -0.3% | 22,312 |
| 1536 | Orange County | California | -0.3% | 3,149,507 |
| 1537 | Tuscola County | Michigan | -0.3% | 52,680 |
| 1538 | Allen Parish | Louisiana | -0.3% | 22,672 |
| 1539 | Kankakee County | Illinois | -0.3% | 105,525 |
| 1540 | Iroquois County | Illinois | -0.3% | 26,150 |
| 1541 | Vermilion County | Illinois | -0.3% | 71,259 |
| 1542 | Essex County | New York | -0.3% | 36,438 |
| 1543 | Posey County | Indiana | -0.3% | 24,988 |
| 1544 | Isabella County | Michigan | -0.3% | 64,691 |
| 1545 | Boulder County | Colorado | -0.3% | 328,560 |
| 1546 | Washington County | Vermont | -0.3% | 59,652 |
| 1547 | Somerset County | Pennsylvania | -0.3% | 72,004 |
| 1548 | Jo Daviess County | Illinois | -0.3% | 21,594 |
| 1549 | Arapahoe County | Colorado | -0.3% | 673,820 |
| 1550 | Rio Arriba County | New Mexico | -0.3% | 39,832 |
1830 ranked entries.