Haapavesi is a town and a municipality of Finland.
It is located in the North Ostrobothnia region. The name means "Aspen Water". The town has a population of 6,404 (31 August 2024) and covers an area of 1,086.11 square kilometres (419.35 sq mi) of which 36.41 km2 (14.06 sq mi) is water. The population density is 6.1 inhabitants per square kilometre (16/sq mi). Neighbour municipalities are Haapajärvi, Kärsämäki, Nivala, Oulainen, Raahe, Siikalatva and Ylivieska.
The municipality is unilingually Finnish.
The town is the Finnish national kantele village. It is also known for the Haapavesi Folk Music Festival which gathers folk musicians together.
At Haapavesi, there is a 327 metres (1,073 ft) tall guyed TV mast, which belongs to Finland's tallest man-made structures.
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