Oulainen (Swedish: Oulainen, also Oulais) 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 6,922
(31 August 2024) 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
11.78 inhabitants per square kilometre (30.5/sq mi). Oulainen is founded in 1865, and it received township rights in 1977.
The municipality is unilingually Finnish. The municipality has previously also been known as "Oulais" in Swedish documents, but is today referred to as "Oulainen" also in Swedish.
64.2676156,24.8159482