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 and covers an area of of which is water. The population density is . The municipality is unilingually Swedish, with 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).