Kiiminki was a municipality of Finland. Along with Haukipudas, Oulunsalo and Yli-Ii municipalities it was merged with the city of Oulu on 1 January 2013. Kiiminki municipality was part of the Oulu province in the Northern Ostrobothnia region. The municipality had a population of 13,320 and covered an area of 339.00 square kilometres (130.89 sq mi) of which 326.82 km² is water. The municipality was unilingually Finnish.