Lakes / Illinois / Marion County
Lakes in Marion County, Illinois
5 lakes counted in Marion County - the largest is Centralia Reservoir at 645.08 acres.
5
Lakes Counted
645.08 acres
Largest - Centralia Reservoir
Marion County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Centralia Reservoir | Marion | 645.08 acres | - |
| 2 | Forbes Lake | Marion | 523.37 acres | - |
| 3 | Lake Centralia | Marion | 249.58 acres | - |
| 4 | Salem Reservoir | Marion | 65.48 acres | - |
| 5 | C and EI Reservoir | Marion | 45.96 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.