Putnam County, Illinois
Putnam County, Illinois | |
|---|---|
Putnam County Courthouse, Hennepin | |
Location within the U.S. state of Illinois | |
| Coordinates: 41°12′N 89°17′W / 41.2°N 89.28°W | |
| Country | United States |
| State | Illinois |
| Founded | 1825 |
| Named after | Israel Putnam |
| Seat | Hennepin |
| Largest village | Granville |
| Area | |
• Total | 172 sq mi (450 km2) |
| • Land | 160 sq mi (410 km2) |
| • Water | 12 sq mi (31 km2) 7.0% |
| Population (2020) | |
• Total | 5,637 |
• Estimate (2024) | 5,633 |
| • Density | 35/sq mi (14/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional districts | 14th, 16th |
| Website | www |
Putnam County is the least extensive county in the U.S. state of Illinois. According to the 2020 United States census, it had a population of 5,637. The county seat is Hennepin. The county was formed in 1825 out of Fulton County and named after Israel Putnam, who was a general in the American Revolution. Putnam County is part of the Ottawa, IL Micropolitan Statistical Area.