Fusa is a municipality in the county of Hordaland, Norway. Fusa was separated from Os in 1856. Hålandsdal and Strandvik were separated from Fusa on 1 January 1903, but they were both again merged with Fusa on 1 January 1964.In 2007, Fusa participated in a trial where the mayor was directly elected. The sitting mayor, Hans S. Vindenes, won the election with 51.8% of the votes.
The municipality (originally the parish) is named after the farm Fusa (Old Norse Fúsar), since the first church was built there. The name may be derived from the Old Norse word fúss which means "eager" (possibly referring to a strong stream). The name may instead have been derived from the old verb fusa, which had some meaning referring to running water. Until 1918, the name was written Fuse.