US Census Bureau · ACS 2023
Every US county ranked by total population, from largest to smallest, based on the Census Bureau ACS 5-Year Estimates.
| # | County | State | Population |
|---|---|---|---|
| 1826 | Shelby County | Illinois | 20,867 |
| 1827 | Ogemaw County | Michigan | 20,853 |
| 1828 | Greene County | Virginia | 20,850 |
| 1829 | Perry County | Illinois | 20,810 |
| 1830 | Coahoma County | Mississippi | 20,808 |
| 1831 | Jones County | Iowa | 20,799 |
| 1832 | Sullivan County | Indiana | 20,766 |
| 1833 | Meriwether County | Georgia | 20,757 |
| 1834 | Dukes County | Massachusetts | 20,751 |
| 1835 | Fairfield County | South Carolina | 20,741 |
| 1836 | Colorado County | Texas | 20,736 |
| 1837 | Breckinridge County | Kentucky | 20,722 |
| 1838 | Assumption Parish | Louisiana | 20,720 |
| 1839 | Adams County | Washington | 20,690 |
| 1840 | Buena Vista County | Iowa | 20,684 |
| 1841 | Carroll County | Iowa | 20,677 |
| 1842 | Lincoln County | Montana | 20,656 |
| 1843 | Buchanan County | Iowa | 20,645 |
| 1844 | Kewaunee County | Wisconsin | 20,621 |
| 1845 | Morgan County | Georgia | 20,614 |
| 1846 | Uinta County | Wyoming | 20,605 |
| 1847 | Montague County | Texas | 20,599 |
| 1848 | Worth County | Georgia | 20,575 |
| 1849 | Barnwell County | South Carolina | 20,565 |
| 1850 | DeKalb County | Tennessee | 20,551 |
Data from the US Census Bureau American Community Survey (ACS) 5-Year Estimates, 2019–2023. Rankings include all counties, county equivalents, and independent cities in the United States. Click any county to see its full profile.