Sandhornøya is a mountainous island in the municipality of Gildeskål in Nordland county, Norway. The 103-square-kilometre (40 sq mi) island is located south of the town of Bodø near the entrance to the Saltfjorden. The mainland of Norway lies to the east and the island of Sørarnøy lies to the west. The villages of Lekanger, Mårnes, and Våg are located on the island. The island is connected to the mainland by the Sandhornøy Bridge. Sandhornøy is also the birthplace of famous Norwegian professor and hymn writer, Elias Blix.