| Lammasjärvi | |
| Pushpin Map: | Finland |
| Location: | Kuhmo |
| Coords: | 64.0833°N 72°W |
| Inflow: | Lentuankoski |
| Outflow: | Pajakkajoki |
| Catchment: | Oulujoki |
| Basin Countries: | Finland |
| Area: | 46.816km2 |
| Depth: | 4.32m (14.17feet) |
| Max-Depth: | 21m (69feet) |
| Volume: | 0.202km3 |
| Shore: | 219.23km (136.22miles) |
| Elevation: | 162.6m (533.5feet) |
| Frozen: | December–May |
| Islands: | Mantereensaari, Likosaari |
| Cities: | Kuhmo |
Lammasjärvi is a medium-sized lake in the Oulujoki main catchment area. It is located in the Kainuu region, Kuhmo municipality in Finland.[1]