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 |
|---|---|---|---|---|
| 2251 | Mono County | California | 12,505 | -1.5% |
| 2252 | Fulton County | Arkansas | 12,492 | -0.5% |
| 2253 | Monroe County | West Virginia | 12,491 | -0.2% |
| 2254 | Amite County | Mississippi | 12,487 | -0.1% |
| 2255 | Wilbarger County | Texas | 12,481 | 0.1% |
| 2256 | Jackson County | Tennessee | 12,466 | 0.2% |
| 2257 | Cass County | Illinois | 12,463 | -0.5% |
| 2257 | Pulaski County | Indiana | 12,463 | 0.2% |
| 2259 | Mason County | Illinois | 12,411 | -0.6% |
| 2260 | Chippewa County | Minnesota | 12,406 | 0.1% |
| 2261 | Kodiak Island Borough | Alaska | 12,387 | -0.1% |
| 2262 | Yalobusha County | Mississippi | 12,375 | -0.7% |
| 2263 | Washington County | Kentucky | 12,368 | 0.5% |
| 2264 | Grundy County | Iowa | 12,361 | -0.1% |
| 2265 | Lyon County | Iowa | 12,354 | -0.4% |
| 2266 | Douglas County | Missouri | 12,342 | 0.5% |
| 2267 | Howard County | Arkansas | 12,306 | -1.5% |
| 2268 | Allen County | Kansas | 12,302 | -0.5% |
| 2269 | Bienville Parish | Louisiana | 12,269 | -0.8% |
| 2270 | Clay County | North Carolina | 12,239 | 2.3% |
| 2271 | Crawford County | Georgia | 12,206 | -0.5% |
| 2272 | Colfax County | New Mexico | 12,184 | -1.0% |
| 2273 | Heard County | Georgia | 12,149 | 0.3% |
| 2274 | Reeves County | Texas | 12,138 | 0.1% |
| 2275 | Morris County | Texas | 12,133 | -0.3% |
| 2276 | Appanoose County | Iowa | 12,077 | -0.2% |
| 2277 | Lunenburg County | Virginia | 12,058 | -0.2% |
| 2278 | Custer County | Montana | 12,034 | 0.5% |
| 2279 | Big Horn County | Wyoming | 12,024 | 0.1% |
| 2280 | Pike County | Indiana | 12,003 | -0.6% |
| 2280 | Mississippi County | Missouri | 12,003 | 0.5% |
| 2282 | McIntosh County | Georgia | 11,989 | 1.5% |
| 2283 | Lincoln County | Washington | 11,982 | 1.3% |
| 2284 | Newton County | Texas | 11,954 | -0.3% |
| 2285 | Live Oak County | Texas | 11,929 | 0.6% |
| 2286 | Choctaw County | Alabama | 11,904 | -1.5% |
| 2287 | Braxton County | West Virginia | 11,885 | -1.4% |
| 2288 | Prowers County | Colorado | 11,884 | -0.2% |
| 2289 | Northampton County | Virginia | 11,879 | -1.2% |
| 2290 | Menard County | Illinois | 11,863 | -0.5% |
| 2291 | Union County | Iowa | 11,829 | -0.8% |
| 2292 | Fergus County | Montana | 11,825 | 0.0% |
| 2293 | Decatur County | Tennessee | 11,820 | 0.7% |
| 2294 | Lawrence County | Mississippi | 11,819 | 0.7% |
| 2295 | Red River County | Texas | 11,816 | -0.2% |
| 2296 | Linn County | Missouri | 11,815 | -0.5% |
| 2297 | Barton County | Missouri | 11,795 | 0.4% |
| 2298 | Haskell County | Oklahoma | 11,787 | -0.3% |
| 2299 | Dawson County | Texas | 11,776 | -0.6% |
| 2300 | Little River County | Arkansas | 11,763 | 0.5% |
3144 ranked entries.