Lake Mattoon Reservoir
| Reservoir Name | Lake Mattoon |
| Dam Name | Lake Mattoon Dam |
| River | Little Wabash River |
| Administration City | Illinois |
| Country | United States |
| Year | 1957 |
| Dam Height | 14 |
| Dam Length | 686 |
| Area(Sqkm) | 3.6 |
| Area(Polygonal) | 3.6 |
| Capital Expenditure | 27.8 |
| Depth(M) | 7.7 |
| Avg Displacement Of Water | 1775 |
| Catchment Area In Sqkm | 161 |
| Main Usage | Water supply |
| Status | 2: Good |
| Longitude | -88.482083 |
| Latitude | 39.337083 |
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