Marshall County | |
|---|---|
 Lacon Bridge in the county seat | |
 Location within the U.S. state of Illinois | |
 Illinois's location within the U.S. | |
| Coordinates: 41°02′N 89°20′W / 41.03°N 89.34°W | |
| Country |  United States |
| State |  Illinois |
| Founded | January 19, 1839 |
| Named for | 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 (30 km2) 2.9% |
| Population (2020) | |
| • Total | 11,742 |
| • Density | 29/sq mi (11/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.[1] Its county seat is Lacon.[2]
Marshall County is part of the Peoria, IL Metropolitan Statistical Area.
- ^ "Marshall County, Illinois". United States Census Bureau. Retrieved June 10, 2023.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.