Lakes / Illinois / Franklin County / Lake Hamilton
Lake Hamilton, Illinois
33.11 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
38.05 degrees N, 88.91 degrees W - Franklin County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Lake Hamilton Stacks Up
- Larger than 17% of the 511 lakes counted in Illinois.
- About 28 miles from Carbondale, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Benton | Franklin | 0.5 mi | 44.48 acres |
| Lake Moses | Franklin | 2.9 mi | 159.63 acres |
| Mine Number 21 Reservoir | Franklin | 5.0 mi | 17,062.04 acres |
| Sesser Lake | Franklin | 7.1 mi | 42.26 acres |
| Valier Lake | Franklin | 7.7 mi | 57.32 acres |
| Raw Water Reservoir | Jefferson | 9.6 mi | 87.97 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Hamilton
How Big Is Lake Hamilton?
Lake Hamilton covers 33.11 acres in Franklin County, Illinois.
What Is the Largest Lake in Franklin County?
Mine Number 21 Reservoir is the largest lake in Franklin County, at 17,062.04 acres.
Largest Lakes in Illinois
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Carlyle Lake | Clinton | 22,796.77 acres | - |
| 2 | Mine Number 21 Reservoir | Franklin | 17,062.04 acres | - |
| 3 | Upper Peoria Lake | Woodford | 15,460.64 acres | - |
| 4 | Lake Shelbyville | Shelby | 10,235.1 acres | - |
| 5 | Crab Orchard Lake | Williamson | 7,292.57 acres | - |
All 511 Illinois lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 48784972). Verified October 30, 2026.