Jomala is a municipality of Åland, an autonomous territory of Finland. The municipality has a population of 4,321 (31 August 2013) and covers an area of 686.96 square kilometres (265.24 sq mi) of which 544.43 km2 (210.21 sq mi) is water. The population density is 30.32 inhabitants per square kilometre (78.5 /sq mi). The municipality is unilingually Swedish. Mariehamn Airport is located in Jomala.
The church of Jomala is dedicated to the patron saint of Åland, St. Olav. It is the oldest surviving church in Finland and it is situated in the village of Prästgården. The oldest parts of the church date from the 13th century. The church tower is 52 meters tall and there is also a memorial for all the Ålanders who have moved away. The "King of Åland" Julius Sundblom is buried here. In the old times there was a great estate on the eastern side of the church.
The Lemström channel divides Jomala from its neighboring municipality, Lemland. It was widened by Russian POWs in 1882.
The Kungsö battery was one of the ten coastal batteries which the Russians built in Åland during the First World War in 1916. The battery was situated 32 meters above sea level, on the highest point of Dalsberg. Finnish, Swedish and German troops invaded it in 1918. It was dismantled in 1919 by Finnish civilian workers.