Lakes / Illinois / Sangamon County
Lakes in Sangamon County, Illinois
3 lakes counted in Sangamon County - the largest is Lake Springfield at 3,899.08 acres.
3
Lakes Counted
3,899.08 acres
Largest - Lake Springfield
Sangamon County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Springfield | Sangamon | 3,899.08 acres | - |
| 2 | Clear Lake | Sangamon | 136.4 acres | - |
| 3 | Sudduth Lake | Sangamon | 36.82 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.