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 |
|---|---|---|---|---|
| 501 | Harrison County | Texas | 0.8% | 71,956 |
| 502 | Whatcom County | Washington | 0.8% | 236,392 |
| 503 | Fulton County | Georgia | 0.8% | 1,098,791 |
| 504 | Maricopa County | Arizona | 0.8% | 4,689,558 |
| 505 | Knox County | Tennessee | 0.8% | 511,453 |
| 506 | Jasper County | Missouri | 0.8% | 127,428 |
| 507 | Sedgwick County | Kansas | 0.8% | 538,433 |
| 508 | Sagadahoc County | Maine | 0.8% | 37,979 |
| 509 | Audrain County | Missouri | 0.8% | 24,528 |
| 510 | Walker County | Georgia | 0.8% | 70,250 |
| 511 | Matagorda County | Texas | 0.8% | 36,463 |
| 512 | Hanover County | Virginia | 0.8% | 116,423 |
| 513 | Lawrence County | Indiana | 0.7% | 45,568 |
| 514 | West Baton Rouge Parish | Louisiana | 0.7% | 28,756 |
| 515 | Hardin County | Kentucky | 0.7% | 113,482 |
| 516 | Johnson County | Iowa | 0.7% | 160,044 |
| 517 | Ottawa County | Michigan | 0.7% | 308,459 |
| 518 | Poinsett County | Arkansas | 0.7% | 22,483 |
| 519 | Franklin County | Pennsylvania | 0.7% | 160,652 |
| 520 | Lamar County | Mississippi | 0.7% | 67,403 |
| 521 | Lenoir County | North Carolina | 0.7% | 55,837 |
| 522 | Davis County | Utah | 0.7% | 381,227 |
| 523 | Riley County | Kansas | 0.7% | 72,598 |
| 524 | Ozaukee County | Wisconsin | 0.7% | 94,346 |
| 525 | Putnam County | Florida | 0.7% | 77,734 |
| 526 | Warrick County | Indiana | 0.7% | 66,803 |
| 527 | Chatham County | Georgia | 0.7% | 311,855 |
| 528 | Chilton County | Alabama | 0.7% | 47,708 |
| 529 | San Patricio County | Texas | 0.7% | 72,053 |
| 530 | Marion County | Oregon | 0.7% | 355,777 |
| 531 | Suwannee County | Florida | 0.7% | 48,149 |
| 532 | Rockland County | New York | 0.7% | 357,397 |
| 533 | Autauga County | Alabama | 0.7% | 61,920 |
| 534 | Indian River County | Florida | 0.7% | 172,799 |
| 535 | Pike County | Georgia | 0.7% | 20,932 |
| 536 | Kent County | Michigan | 0.7% | 675,232 |
| 537 | Woodford County | Kentucky | 0.7% | 27,883 |
| 538 | Bedford County | Virginia | 0.7% | 83,059 |
| 539 | Christian County | Missouri | 0.7% | 96,725 |
| 540 | Cassia County | Idaho | 0.7% | 26,397 |
| 541 | Marshall County | Mississippi | 0.7% | 34,654 |
| 542 | Linn County | Iowa | 0.7% | 232,028 |
| 543 | Polk County | North Carolina | 0.7% | 20,533 |
| 544 | Jasper County | Indiana | 0.7% | 33,894 |
| 545 | Weber County | Utah | 0.7% | 278,174 |
| 546 | Powhatan County | Virginia | 0.7% | 32,591 |
| 547 | Kent County | Rhode Island | 0.7% | 173,495 |
| 548 | Mower County | Minnesota | 0.7% | 40,971 |
| 549 | Thurston County | Washington | 0.7% | 304,261 |
| 550 | Beaufort County | South Carolina | 0.7% | 204,433 |
1830 ranked entries.