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 |
|---|---|---|---|
| 551 | Lycoming County | Pennsylvania | 113,570 |
| 552 | Northwest Hills Planning Region | Connecticut | 112,848 |
| 553 | Ontario County | New York | 112,405 |
| 554 | Androscoggin County | Maine | 112,323 |
| 555 | LaPorte County | Indiana | 112,141 |
| 556 | Delaware County | Indiana | 112,109 |
| 557 | Craighead County | Arkansas | 112,097 |
| 558 | Pennington County | South Dakota | 112,081 |
| 559 | Douglas County | Oregon | 111,807 |
| 560 | Hanover County | Virginia | 111,652 |
| 561 | Cowlitz County | Washington | 111,539 |
| 562 | Hardin County | Kentucky | 111,452 |
| 563 | Bartow County | Georgia | 111,153 |
| 564 | Matanuska-Susitna Borough | Alaska | 110,677 |
| 565 | Madison County | Mississippi | 110,303 |
| 566 | Warren County | New Jersey | 110,238 |
| 567 | Mercer County | Pennsylvania | 109,852 |
| 568 | Bradley County | Tennessee | 109,743 |
| 569 | Miami County | Ohio | 109,549 |
| 570 | Cass County | Missouri | 109,393 |
| 571 | LaSalle County | Illinois | 109,049 |
| 572 | Eaton County | Michigan | 109,000 |
| 573 | Platte County | Missouri | 108,751 |
| 574 | Carver County | Minnesota | 108,622 |
| 575 | Flathead County | Montana | 108,445 |
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.