Onamia Lake
| Dam Name | Onamia Lake |
| River | Rum River |
| Administration City | Minnesota |
| Country | United States |
| Year | 1938 |
| Dam Height | 2 |
| Dam Length | 15 |
| Area(Sqkm) | 4.3 |
| Area(Polygonal) | 4.3 |
| Capital Expenditure | 20.9 |
| Depth(M) | 4.9 |
| Avg Displacement Of Water | 2805 |
| Catchment Area In Sqkm | 1171 |
| Main Usage | Other |
| Status | 4: Poor |
| Longitude | -93.674583 |
| Latitude | 46.074583 |
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