Lakes / Illinois / St. Clair County
Lakes in St. Clair County, Illinois
6 lakes counted in St. Clair County - the largest is Grand Marais Lake at 83.23 acres.
6
Lakes Counted
83.23 acres
Largest - Grand Marais Lake
St. Clair County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Grand Marais Lake | St. Clair | 83.23 acres | - |
| 2 | Spring Lake | St. Clair | 66.47 acres | - |
| 3 | Round Pond | St. Clair | 51.65 acres | - |
| 4 | Brush Lake | St. Clair | 37.31 acres | - |
| 5 | River King Mine Lake | St. Clair | 28.53 acres | - |
| 6 | Biebell Lake | St. Clair | 26.93 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.