Lakes / Illinois / Macon County
Lakes in Macon County, Illinois
1 lakes counted in Macon County - the largest is Lake Decatur at 2,904.48 acres.
1
Lakes Counted
2,904.48 acres
Largest - Lake Decatur
Macon County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.
All Counted Lakes
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake Decatur | Macon | 2,904.48 acres | - |
Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.