Finström is a municipality of Åland, an autonomous territory of Finland. The municipality has a population of 2,624 of which 90.1% speak Swedish and 2.5% Finnish as their first language. The municipality covers an area of 172.50 square kilometres (66.60 sq mi) of which 49.23 km2 (19.01 sq mi) is water. The population density is 21.26 inhabitants per square kilometre (55.1/sq mi). The municipality is unilingually Swedish.