Clark County, Illinois
Clark County | |
|---|---|
Clark County Courthouse in Marshall | |
Location within the U.S. state of Illinois | |
Illinois's location within the U.S. | |
| Coordinates: 39°20′N 87°47′W / 39.33°N 87.79°W | |
| Country | United States |
| State | Illinois |
| Founded | 1819 |
| Named after | George Rogers Clark |
| Seat | Marshall |
| Largest city | Marshall |
| Area | |
• Total | 505 sq mi (1,310 km2) |
| • Land | 501 sq mi (1,300 km2) |
| • Water | 3.4 sq mi (9 km2) 0.7% |
| Population (2020) | |
• Total | 15,455 |
• Estimate (2023) | 15,088 |
| • Density | 31/sq mi (12/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 12th |
| Website | www |
Clark County is a county located in the southeastern part of U.S. state of Illinois, along the Indiana state line. As of the 2020 census, the population was 15,455. Its county seat is Marshall. The county was named for George Rogers Clark, an officer who served in the American Revolution.