Lakes / Illinois / Warren County
Lakes in Warren County, Illinois
3 lakes counted in Warren County - the largest is Little Swan Lake at 228.33 acres.
3
Lakes Counted
228.33 acres
Largest - Little Swan Lake
Warren County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Little Swan Lake | Warren | 228.33 acres | - |
| 2 | Lake Warren | Warren | 42.26 acres | - |
| 3 | Citizens Lake | Warren | 25.45 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.