Siikajoki

Siikajoki is a municipality of Finland. It is part of the North Ostrobothniaregion. The municipality has a population of 4,723 (31 December 2025) and covers an area of 1,653.89 square kilometres (638.57 sq mi) of which 601.94 km (232.41 sq mi) is water. The population density is 4.47 inhabitants per square kilometre (11.6/sq mi). Neighbour municipalities are Hailuoto, Liminka, Lumijoki, Raahe and Siikalatva.

The municipality is unilingually Finnish.