Marshall County, Illinois
Marshall County, Illinois | |
|---|---|
Lacon Bridge in the county seat | |
Location within the U.S. state of Illinois | |
| Coordinates: 41°02′N 89°20′W / 41.03°N 89.34°W | |
| Country | United States |
| State | Illinois |
| Founded | January 19, 1839 |
| Named after | John Marshall |
| Seat | Lacon |
| Largest city | Henry |
| Area | |
• Total | 399 sq mi (1,030 km2) |
| • Land | 387 sq mi (1,000 km2) |
| • Water | 12 sq mi (31 km2) 2.9% |
| Population (2020) | |
• Total | 11,742 |
• Estimate (2024) | 11,552 |
| • Density | 30.3/sq mi (11.7/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 16th |
| Website | www |
Marshall County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 11,742. Its county seat is Lacon. Marshall County is part of the Peoria metropolitan area.