Sandoy (. English: Sandisland) is the first of the five southern islands that make up the Faroe chain, the fifth biggest of all the Faroe Islands, an autonomous region of the Kingdom of Denmark. , the largest population center on the island is the village of Sandur with a population of 599. Other settlements include Skarvanes, Skopun, Skálavík, Húsavík and Dalur.

Sandøy is an island municipality in Møre og Romsdal county, Norway. It is part of the Romsdal region. The administrative centre is the village of Steinshamn. Other villages include Ona and Myklebost. The municipality is spread out over many islands in the mouth of the Romsdalsfjorden. The Flatflesa Lighthouse and Ona Lighthouse protect the boats traveling around the municipality.