The town has a population of 12,157 (31 December 2025) and covers an area of 2,391.30 square kilometres (923.29 sq mi) of which 1,469.15 km2 (567.24 sq mi) is water. The population density is 13.16 inhabitants per square kilometre (34.1/sq mi). The municipality is unilingually Finnish. The first reference to Kalajoki can be found from the beginning of 16th century and it got the status of a parish in 1525, it was designated as a regional parish in 1545. This status ended with the abolishment of the parish form of organization in the early 1860s. Kalajoki was a significant market place and controlled the whole region's tar trading. By the end of 19th century the meaning of tar was diminishing as a good and the importance of Kalajoki was reduced thereafter. More information...
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