| Iso-Pyhäntä | |
| Pushpin Map: | Finland |
| Coords: | 64.4729°N 28.3763°W |
| Type: | Lake |
| Basin Countries: | Finland |
| Area: | 11.564km2 |
| Depth: | 7.17m (23.52feet) |
| Max-Depth: | 32m (105feet) |
| Volume: | 0.0829km3 |
| Shore: | 56.29km (34.98miles) |
| Elevation: | 149.4m (490.2feet) |
| Frozen: | December–April |
| Islands: | Ironsaari |
Iso-Pyhäntä is a medium-sized lake in northern Finland, 15 km southeast of Ristijärvi settlement. It belongs to the Oulujoki main catchment area. It is located in the Kainuu region.[1]