Blomøyna, or Blomøy, is an island in the municipality of Øygarden in Vestland county, Norway.

The southern part of the island is split into two parts by the Blomvågen fjord which cuts northward for 2 kilometres (1.2 mi) into the island.

The village of Blomvåg surrounds the inner part of the Blomvågen fjord.

Blomvåg Church is located in the village, serving the whole southern part of the municipality.

This article about an island in Vestland is a stub.