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 |
|---|---|---|---|---|
| 551 | Mayes County | Oklahoma | 0.7% | 40,416 |
| 552 | McDonald County | Missouri | 0.7% | 23,992 |
| 553 | Huntington County | Indiana | 0.7% | 37,224 |
| 554 | Sampson County | North Carolina | 0.7% | 61,504 |
| 555 | Marion County | Iowa | 0.7% | 34,192 |
| 556 | Fairfax County | Virginia | 0.7% | 1,167,873 |
| 557 | Calcasieu Parish | Louisiana | 0.7% | 208,466 |
| 558 | Cherokee County | South Carolina | 0.7% | 58,275 |
| 559 | Laclede County | Missouri | 0.7% | 36,943 |
| 560 | Pierce County | Washington | 0.7% | 946,288 |
| 561 | Dane County | Wisconsin | 0.7% | 590,375 |
| 562 | Hillsborough County | New Hampshire | 0.7% | 433,415 |
| 563 | Knox County | Ohio | 0.7% | 64,002 |
| 564 | Greene County | Missouri | 0.7% | 309,286 |
| 565 | Barnwell County | South Carolina | 0.7% | 20,653 |
| 566 | Chelan County | Washington | 0.7% | 81,941 |
| 567 | Stokes County | North Carolina | 0.7% | 46,126 |
| 568 | DeKalb County | Alabama | 0.7% | 74,085 |
| 569 | Graves County | Kentucky | 0.7% | 37,050 |
| 570 | Bannock County | Idaho | 0.7% | 91,591 |
| 571 | York County | Pennsylvania | 0.7% | 473,197 |
| 572 | Miami County | Ohio | 0.7% | 112,634 |
| 573 | Lebanon County | Pennsylvania | 0.7% | 146,380 |
| 574 | Charleston County | South Carolina | 0.7% | 436,200 |
| 575 | Colbert County | Alabama | 0.7% | 59,474 |
| 576 | Crow Wing County | Minnesota | 0.7% | 69,132 |
| 577 | Winchester city | Virginia | 0.7% | 28,272 |
| 578 | Chesterfield County | South Carolina | 0.7% | 44,740 |
| 579 | Manassas city | Virginia | 0.7% | 44,332 |
| 580 | Sullivan County | Indiana | 0.7% | 20,831 |
| 581 | Yellowstone County | Montana | 0.7% | 172,692 |
| 582 | Licking County | Ohio | 0.7% | 185,564 |
| 583 | Wayne County | Pennsylvania | 0.7% | 51,703 |
| 584 | Greene County | Tennessee | 0.7% | 73,831 |
| 585 | Meade County | Kentucky | 0.7% | 30,699 |
| 586 | Spalding County | Georgia | 0.7% | 70,775 |
| 587 | Marshall County | Alabama | 0.7% | 103,537 |
| 588 | Franklin County | Ohio | 0.7% | 1,361,536 |
| 589 | Coffee County | Georgia | 0.7% | 44,407 |
| 590 | Franklin County | Missouri | 0.7% | 108,090 |
| 591 | Westchester County | New York | 0.7% | 1,015,743 |
| 592 | Jefferson County | Indiana | 0.7% | 33,279 |
| 593 | Cape Girardeau County | Missouri | 0.6% | 83,999 |
| 594 | Seneca County | New York | 0.6% | 32,883 |
| 595 | White County | Georgia | 0.6% | 29,802 |
| 596 | Franklin County | Indiana | 0.6% | 23,286 |
| 597 | Martin County | Florida | 0.6% | 166,272 |
| 598 | Fluvanna County | Virginia | 0.6% | 28,975 |
| 599 | Lumpkin County | Georgia | 0.6% | 36,178 |
| 600 | Sullivan County | Tennessee | 0.6% | 163,759 |
1830 ranked entries.