Orust Municipality is a municipality in Västra Götaland County in western Sweden. Its seat is located in the town of Henån, with an approximate population of 1,800.
The municipality includes Sweden's third largest island Orust and some other small adjacent islets. The year-round population of around 15,000 increases significantly in the summer due to an influx of summer vacationers.
The former municipal entities on the island Orust and adjacent minor islands were grouped into larger units in 1952 and united into a single municipality in connection with the nationwide municipal reform of 1971.
Coordinates 58°14'10.188" N 11°40'45.617" E