| Ullavanjärvi | |
| Location: | Kokkola |
| Coords: | 63.65°N 28°W |
| Pushpin Map: | Finland |
| Basin Countries: | Finland |
| Area: | 13.069km2 |
| Shore: | 72.8km (45.2miles) |
| Elevation: | 112.6m (369.4feet) |
| Frozen: | December–April |
| Islands: | Talvisaari, Iso Hiidenluoto |
Ullavanjärvi is a medium-sized lake in the Perhonjoki main catchment area. It is located in the region of Central Ostrobothnia in Finland.[1]