Lakes / Illinois / Macoupin County
Lakes in Macoupin County, Illinois
15 lakes counted in Macoupin County - the largest is Otter Lake at 419.34 acres.
15
Lakes Counted
419.34 acres
Largest - Otter Lake
Macoupin County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Otter Lake | Macoupin | 419.34 acres | - |
| 2 | New Gillespie Lake | Macoupin | 205.34 acres | - |
| 3 | Lake Carlinville | Macoupin | 155.92 acres | - |
| 4 | Sunset Lake | Macoupin | 123.31 acres | - |
| 5 | Staunton Reservoir | Macoupin | 83.77 acres | - |
| 6 | Bunn Lake | Macoupin | 78.33 acres | - |
| 7 | Old Gillespie Lake | Macoupin | 68.7 acres | - |
| 8 | Smith Reservoir | Macoupin | 63.75 acres | - |
| 9 | Beaver Dam Lake | Macoupin | 52 acres | - |
| 10 | Bullard Lake | Macoupin | 49.17 acres | - |
| 11 | Lake Catatoga | Macoupin | 42.75 acres | - |
| 12 | Standard City Lake | Macoupin | 41.91 acres | - |
| 13 | Mount Olive Lake | Macoupin | 39.54 acres | - |
| 14 | Palmyra-Modesto City Lake | Macoupin | 36.57 acres | - |
| 15 | Old Mount Olive Reservoir | Macoupin | 35.34 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.