Ostrobothnia

Ostrobothnia (East Bothnia) refers to various areas in Finland:
 * Ostrobothnia County, province of the Kingdom of Sweden 1634–1775
 * Ostrobothnia (historical province), province of the Kingdom of Sweden before 1809
 * Ostrobothnia (region), in modern Finland
 * Other regions in modern Finland:
 * South Ostrobothnia
 * Central Ostrobothnia
 * North Ostrobothnia