Ontario Reservoir
| Reservoir Name | Ontario |
| Dam Name | Iroquois |
| River | St. Lawrence |
| Administration City | Ontario |
| Country | Canada |
| Secondary Country | United States |
| Year | 1958 |
| Dam Height | 20 |
| Dam Length | -99 |
| Area(Sqkm) | 19347 |
| Area(Polygonal) | 19347 |
| Capital Expenditure | 29960 |
| Depth(M) | 1.5 |
| Avg Displacement Of Water | 7264219 |
| Catchment Area In Sqkm | 766137 |
| Main Usage | Hydroelectricity |
| Status | 3: Fair |
| Longitude | -75.795417 |
| Latitude | 44.482917 |
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