Lakes / Illinois / Sangamon County / Clear Lake
Clear Lake, Illinois
136.4 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Illinois
39.82 degrees N, 89.53 degrees W - Sangamon 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 Clear Lake Stacks Up
- Larger than 67% of the 511 lakes counted in Illinois.
- About 7 miles from Springfield, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lake Springfield | Sangamon | 8.4 mi | 3,899.08 acres |
| Sangchris Lake | Christian | 14 mi | 2,260.03 acres |
| Sudduth Lake | Sangamon | 17 mi | 36.82 acres |
| Lake Kincaid | Christian | 19 mi | 31.33 acres |
| Lake Petersburg | Menard | 21 mi | 177.42 acres |
| Lincoln Lakes | Logan | 23 mi | 65.73 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Clear Lake
How Big Is Clear Lake?
Clear Lake covers 136.4 acres in Sangamon County, Illinois.
What Is the Largest Lake in Sangamon County?
Lake Springfield is the largest lake in Sangamon County, at 3,899.08 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 133216439). Verified October 30, 2026.