A town of 929, settled in 1837. Home to 2 places on the National Register of Historic Places.
The 2 things Hennepin does most differently from other towns.
In a town this size, neighbors are the best guide. Ask them anything.
Be the first to start the conversation.
Ordered by what stands out in Hennepin. Another town gets a different order.
Most working residents leave Hennepin for work: only 4% work in town. The top destinations are Princeton (6%), Peru (6%) and Hennepin (6%). Half commute less than 14 miles.
Hennepin beats the Illinois average on 6 of 32 CDC measures and trails it on 2.
| What stands out | Hennepin | IL |
|---|---|---|
| Fewer adults facing food insecurity | 10.3% | 15.9% |
| Fewer uninsured adults | 6.6% | 9.9% |
| More adults who have had cancer | 9.9% | 7.6% |
Hennepin has chilly winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 15°, and about 29 inches of snow falls in a normal winter.
Expected storm and flood damage is higher than in 38% of U.S. communities.
0.1 miles of trails across 1 parks and preserves.
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Donnelley State Fish and Wildlife Area | — | 135 |
The median sale price was $135,000 in May 2026.
Where Hennepin’s working residents go each day. Line width shows the share.
Census LEHD 2023
6 postcards, papers and photographs from public archives, and 2 places on the National Register.
2 places in Hennepin on the National Register of Historic Places.
Town in Illinois, United States
Hennepin is a village located on the Illinois River in Putnam County, Illinois, United States. As of the 2020 census, Hennepin had a population of 769. It is the county seat and the second largest village in Putnam County. Hennepin is part of the Ottawa Micropolitan Statistical Area.
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