Karijoki () is a municipality of Finland. It is part of the South Ostrobothnia region. The population of Karijoki is (), which makes it the smallest municipality in South Ostrobothnia in terms of population. The municipality covers an area of of which is inland water (). The population density is . The municipality is unilingually Finnish. A neanderthal cave, the Wolf cave, was found in the Pyhävuori mountains in Karijoki in 1997. Villages Alakylä Karijoen kirkonkylä Myrkky Ylikylä Notable individuals Aarne Ahola, Knight of the Mannerheim Cross No. 71 Antti Rajamäki, former sprinter Erkki Rankaviita, folk musician Knut Sonck, dean Paul Norrback, accordionist and composer Pentti Lund. ice hockey player Susanna Rajamäki, athlete References External links Karijoen kunta – The official website of the municipality Municipalities of South Ostrobothnia