Lakes / Illinois / Knox County / Lake Calhoun
Lake Calhoun, Illinois
31.88 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
41.11 degrees N, 90.02 degrees W - Knox 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 Calhoun Stacks Up
- Larger than 15% of the 511 lakes counted in Illinois.
- About 36 miles from Peoria, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Old Garage Lake | Knox | 6.3 mi | 25.2 acres |
| Snakeden Hollow Lake | Knox | 7.4 mi | 150.98 acres |
| Lake Windsor | Knox | 9.2 mi | 38.05 acres |
| Green Oaks Lake | Knox | 9.7 mi | 30.15 acres |
| Spoon Lake | Knox | 12 mi | 546.84 acres |
| Johnson Lake | Henry | 17 mi | 55.85 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Calhoun
How Big Is Lake Calhoun?
Lake Calhoun covers 31.88 acres in Knox County, Illinois.
What Is the Largest Lake in Knox County?
Spoon Lake is the largest lake in Knox County, at 546.84 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 154347059). Verified October 30, 2026.