Sandhornøya is a mountainous island in Gildeskål Municipality in Nordland county, Norway. The 103 km2 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 islands of Fleina, Sør-Arnøya, and Nord-Arnøya lie 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. Sandhornøya is also the birthplace of famous Norwegian professor and hymn writer, Elias Blix. A memorial monument of Blix can be seen by the coastline.

Salt festival

On August 29, 2014, the Salt festival was held on a western beach on Sandhornøya. It included three architectural structures that were built on the beach and were inspired by the historic fish racks of Northern Norway. The Finnish architect Sami Rintala designed them. In one of the fish rack buildings, the Chinese artist Yang Fudong created a site specific outdoor film installation for the beach.