Haapajärvi - Wikipedia
en.wikipedia.org › wiki › HaapajärviHaapajärvi is a town and municipality of Finland . It is located in the province of Oulu and is part of the Northern Ostrobothnia region. The town has a population of 6,657 (28 February 2023) [2] and covers an area of 789.11 square kilometres (304.68 sq mi) of which 23.44 km 2 (9.05 sq mi) is water. [1]