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 for | 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 |
| • 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.[1] Its county seat is Marshall.[2] The county was named for George Rogers Clark, an officer who served in the American Revolution.[3]
- ^ "Clark County, Illinois". United States Census Bureau. Retrieved June 8, 2023.
- ^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
- ^ Perrin, p. 237