Lakes / Illinois / Union County
Lakes in Union County, Illinois
4 lakes counted in Union County - the largest is Dongola Lake at 63.51 acres.
4
Lakes Counted
63.51 acres
Largest - Dongola Lake
Union County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Dongola Lake | Union | 63.51 acres | - |
| 2 | Bluff Lake | Union | 61.53 acres | - |
| 3 | Wolf Lake | Union | 59.8 acres | - |
| 4 | Anna State Hospital Reservoir | Union | 27.68 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.