Oulujarvi Reservoir
| Reservoir Name | Oulujarvi |
| Dam Name | Jylhama |
| River | Oulujoki |
| Near City | Oulu |
| Administration City | Northern |
| Country | Finland |
| Year | 1950 |
| Dam Height | 15 |
| Dam Length | 3650 |
| Area(Sqkm) | 889.7 |
| Area(Polygonal) | 889.7 |
| Capital Expenditure | 2343 |
| Depth(M) | 2.6 |
| Avg Displacement Of Water | 206995 |
| Catchment Area In Sqkm | 20773 |
| Main Usage | Hydroelectricity |
| Status | 3: Fair |
| Longitude | 26.76625 |
| Latitude | 64.57875 |
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