Ostrobothnia refers to various areas in Finland:
- Ostrobothnia (historical province), a traditional region () of Finland
- Ostrobothnia County, a county () of the Kingdom of Sweden in 1634–1775
- Modern regions () in Finland:
- Ostrobothnia (administrative region), coastal part of historical Ostrobothnia
- South Ostrobothnia
- Central Ostrobothnia
- North Ostrobothnia
See also
- Bothnia (disambiguation)
- Pohjanmaa (disambiguation)