Clay County, Illinois
Clay County, Illinois | |
|---|---|
Clay County Courthouse in Louisville | |
Location within the U.S. state of Illinois | |
| Coordinates: 38°46′N 88°29′W / 38.76°N 88.49°W | |
| Country | United States |
| State | Illinois |
| Founded | December 23, 1824 (created) March 8, 1825 (organized) |
| Named after | Henry Clay |
| Seat | Louisville |
| Largest city | Flora |
| Area | |
• Total | 469.59 sq mi (1,216.2 km2) |
| • Land | 468.32 sq mi (1,212.9 km2) |
| • Water | 1.28 sq mi (3.3 km2) 0.3% |
| Population (2020) | |
• Total | 13,288 |
• Estimate (2024) | 12,821 |
| • Density | 28.374/sq mi (10.955/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 12th |
| Website | claycountyillinois |
Clay County is a county in the southeastern portion of the U.S. state of Illinois. As of the 2020 United States census, the population was 13,288. Since 1842, its county seat has been Louisville, in the center of the county's area. In 1950, the U.S. Census Bureau placed the mean center of U.S. population in Clay County.