Lumijoki is a municipality of Finland.
It is located in the Northern Ostrobothnia region. The municipality has a population of 2,022
(31 October 2024) and covers an area of 290.29 square kilometres (112.08 sq mi) of
which 77.1 km2 (29.8 sq mi)
is water. The population density is
9.44 inhabitants per square kilometre (24.4/sq mi).
Neighbouring municipalities are Hailuoto, Liminka, Oulu and Siikajoki.
The municipality is unilingually Finnish.
64.8373411,25.1864597