Kustavi (; ) is a municipality of Finland. It is in the province of Western Finland and is part of the Southwest Finland region. The municipality has a population of (), which makes it the smallest municipality in southwest Finland in terms of population. It covers an area of of which is water. The population density is . There are over 2,000 isles within the municipal area. The municipality is a very popular summer resort and contains over 2,800 summer cottages. The population increases tenfold during the summer months. The larger events are Volter Kilpi literature week in July and Salmon market (Lohimarkkinat) in August. The basic services in the municipality include three groceries, a liquor store, a library and a bank. There are two ferry connections to Brändö and Iniö. The municipality is unilingually Finnish even though it is located adjacent to the Swedish speaking Åland-region. The municipality is named after King Gustav III of Sweden. References External links Municipality of Kustavi – Official website Municipalities of Southwest Finland Populated coastal places in Finland Populated places established in 1874 Finnish islands in the Baltic 1874 establishments in Finland