Clinton County, Illinois
Clinton County | |
|---|---|
Location within the U.S. state of Illinois | |
Illinois's location within the U.S. | |
| Coordinates: 38°37′N 89°25′W / 38.61°N 89.42°W | |
| Country | United States |
| State | Illinois |
| Founded | 1824 |
| Named after | DeWitt Clinton |
| Seat | Carlyle |
| Largest city | Breese |
| Area | |
• Total | 503 sq mi (1,300 km2) |
| • Land | 474 sq mi (1,230 km2) |
| • Water | 29 sq mi (80 km2) 5.8% |
| Population (2020) | |
• Total | 36,899 |
• Estimate (2023) | 36,785 |
| • Density | 73/sq mi (28/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 12th |
| Website | clintonco |
Clinton County is a county located in the U.S. state of Illinois. At the 2020 census, the population was 36,899. Its county seat is Carlyle. In 1960, the United States Census Bureau placed the mean center of U.S. population in Clinton County. Clinton County is part of the St. Louis, MO-IL Metropolitan Statistical Area.