The municipality of Austevoll was established on 1 January 1886 when it was separated from the municipality of Sund. The initial population for the new municipality of Austevoll was 2,396. During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1964, the southern part of the islands of Selbjørn and Huftarøy (population: 696) was transferred from Fitjar Municipality to Austevoll. This put the whole Austevoll archipelago in the municipality of Austevoll.