| Pesiöjärvi | |
| Pushpin Map: | Finland |
| Coords: | 64.95°N 68°W |
| Type: | Lake |
| Inflow: | river Mahajoki from the lake Pieni Pesiöjärvi |
| Outflow: | river Pesiönjoki to the lake Kiantajärvi |
| Catchment: | Oulujoki |
| Basin Countries: | Finland |
| Area: | 12.741km2 |
| Depth: | 3.94m (12.93feet) |
| Max-Depth: | 15.82m (51.9feet) |
| Volume: | 0.0502km3 |
| Shore: | 53.89km (33.49miles) |
| Elevation: | 213.9m (701.8feet) |
| Frozen: | December–May |
| Islands: | Honkasaari, Kumpusaari, Pesiösaari, Lehtosaari |
Pesiöjärvi is a medium-sized lake in the Oulujoki main catchment area. It is located in Suomussalmi municipality, in the region Kainuu, Finland.[1]