Rostøya or Rostøy is an island in Austevoll municipality in Vestland county, Norway.

[1] It is located north of the island of Drøna and west of the island of Huftarøy.

The village of Kolbeinsvik lies about 4 kilometres (2.5 mi) south of Rostøya.

The island is connected to Huftarøy by a road bridge that crosses the 12-metre (39 ft) wide channel separating the islands.

This article about an island in Vestland is a stub.