Kökar () is an island municipality to the south-east of the Åland archipelago, Finland.
It is also one of the municipalities of Åland. It is reachable by boat from Långnäs on Åland or from Galtby with access to mainland Finland.
The municipality has a population of 226 (31 October 2024) and covers an area of 2,165.02 square kilometres (835.92 sq mi) of which 2,101.46 km2 (811.38 sq mi) is water. The population density is 3.55 inhabitants per square kilometre (9.2/sq mi).
The municipality is unilingually Swedish (with about %10 Finnish-speaking).
The natural reserve of Östra Långskär is located there. Other notable islands include Kyrkogårdsö.
Ulla-Lena Lundberg, a Finnish author, was born in Kökar in 1947.
59.9207975,20.9091298