| Osmankajärvi | |
| Pushpin Map: | Finland |
| Coords: | 64.5333°N 60°W |
| Basin Countries: | Finland |
| Area: | 11.485km2 |
| Depth: | 2.44m (08.01feet) |
| Max-Depth: | 11m (36feet) |
| Volume: | 0.0281km3 |
| Shore: | 24.49km (15.22miles) |
| Elevation: | 167.3m (548.9feet) |
| Frozen: | November–May |
| Islands: | none |
| Cities: | Paltamo |
Osmankajärvi is a medium-sized lake in the Oulujoki main catchment area. It is located in the region Kainuu in Finland.[1]