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 |
|---|---|---|---|---|
| 201 | Lehigh County | Pennsylvania | 384,383 | 0.4% |
| 202 | Anoka County | Minnesota | 381,605 | 1.0% |
| 203 | Lane County | Oregon | 381,584 | -0.1% |
| 204 | Davis County | Utah | 381,227 | 0.7% |
| 205 | Spartanburg County | South Carolina | 380,857 | 3.0% |
| 206 | Weld County | Colorado | 378,426 | 1.9% |
| 207 | Larimer County | Colorado | 377,292 | 0.8% |
| 208 | Stark County | Ohio | 373,771 | 0.1% |
| 209 | Galveston County | Texas | 372,207 | 1.3% |
| 210 | Washtenaw County | Michigan | 370,214 | 0.3% |
| 211 | Orleans Parish | Louisiana | 362,154 | -0.4% |
| 212 | Rockland County | New York | 357,397 | 0.7% |
| 213 | Somerset County | New Jersey | 356,486 | 0.4% |
| 214 | Marion County | Oregon | 355,777 | 0.7% |
| 215 | Nueces County | Texas | 352,992 | 0.0% |
| 216 | Westmoreland County | Pennsylvania | 349,324 | -0.3% |
| 217 | Durham County | North Carolina | 347,240 | 1.4% |
| 218 | St. Johns County | Florida | 346,328 | 3.9% |
| 219 | Henrico County | Virginia | 342,775 | 0.8% |
| 220 | Howard County | Maryland | 339,183 | 0.4% |
| 221 | Cumberland County | North Carolina | 338,473 | 0.4% |
| 222 | Greater Bridgeport Planning Region | Connecticut | 337,697 | 0.4% |
| 223 | Lancaster County | Nebraska | 334,049 | 0.8% |
| 224 | Escambia County | Florida | 333,834 | 0.4% |
| 225 | Benton County | Arkansas | 332,554 | 3.3% |
| 226 | Luzerne County | Pennsylvania | 332,126 | 0.4% |
| 227 | Fayette County | Kentucky | 329,751 | 0.8% |
| 228 | Lubbock County | Texas | 328,906 | 1.2% |
| 229 | Boulder County | Colorado | 328,560 | -0.3% |
| 230 | Northampton County | Pennsylvania | 324,411 | 0.4% |
| 231 | Rockingham County | New Hampshire | 324,077 | 0.6% |
| 232 | Lorain County | Ohio | 323,219 | 0.6% |
| 233 | Albany County | New York | 321,225 | 0.5% |
| 234 | McHenry County | Illinois | 317,751 | 0.6% |
| 235 | Lexington County | South Carolina | 317,588 | 1.1% |
| 236 | Cumberland County | Maine | 317,222 | 0.8% |
| 237 | Gloucester County | New Jersey | 312,638 | 0.4% |
| 238 | Chatham County | Georgia | 311,855 | 0.7% |
| 239 | Greene County | Missouri | 309,286 | 0.7% |
| 240 | Ottawa County | Michigan | 308,459 | 0.7% |
| 241 | York County | South Carolina | 306,887 | 1.4% |
| 242 | Hays County | Texas | 304,390 | 3.4% |
| 243 | Thurston County | Washington | 304,261 | 0.7% |
| 244 | Cleveland County | Oklahoma | 303,973 | 0.2% |
| 245 | Frederick County | Maryland | 302,883 | 1.3% |
| 246 | Dutchess County | New York | 300,708 | 0.5% |
| 247 | Cherokee County | Georgia | 299,273 | 1.8% |
| 248 | Leon County | Florida | 299,048 | 0.1% |
| 249 | Clayton County | Georgia | 297,471 | 0.1% |
| 250 | Merced County | California | 297,260 | 0.2% |
3144 ranked entries.