🇫🇮 Oulainen

Oulainen is a town and a municipality of Finland. It is located in the Northern Ostrobothnia region, 101 kilometres (63 mi) south of the city of Oulu. The municipality has a population of 6,832 (31 December 2025) and covers an area of 597.53 square kilometres (230.71 sq mi) of which 10.01 km2 (3.86 sq mi) is water. The population density is 11.62 inhabitants per square kilometre (30.1/sq mi). Oulainen is founded in 1865, and it received township rights in 1977.