Sottunga is an island municipality of Åland, an autonomous territory of Finland. The municipality is the smallest when it comes to population in Åland and in Finland, with a population of only 113
(31 August 2024) and covers an area of 342.44 square kilometres (132.22 sq mi) of
which 314.41 km2 (121.39 sq mi)
is water. The population density is
4.03 inhabitants per square kilometre (10.4/sq mi). The municipality is unilingually Swedish, with 93% of the inhabitants speaking Swedish as their native language. Sottunga comprises many islands, of which only three, Husö, Finnö and Storsottunga, are inhabited. Storsottunga is usually called Sottunga. There are five villages in the municipality: Finnö, Husö, Hästö, Mosshaga and Sottunga. The highest point of Sottunga is Kasberget (25 m).
Sottunga can be reached by ferry from Långnäs in Lumparland and Galtby in Korpo and many ferries pass the island without making a stop.