Sanday is one of the inhabited islands of Orkney that lies off the north coast of mainland Scotland. With an area of 50.43 km2 (19.5 sq mi), it is the third largest of the Orkney Islands. The main centres of population are Lady Village and Kettletoft. Sanday can be reached by Orkney Ferries or by plane from Kirkwall on the Orkney Mainland. On Sanday, an on-demand public minibus service allows connecting to the ferry.

Orkney, also known as the Orkney Islands, is an archipelago in the Northern Isles of Scotland, situated off the north coast of the island of Great Britain. Orkney is 10 miles (16 km) north of the coast of Caithness and has about 70 islands, of which 20 are inhabited. The largest island, the Mainland, has an area of 523 square kilometres (202 sq mi), making it the sixth-largest Scottish island and the tenth-largest island in the British Isles. Orkney's largest settlement, and also its administrative centre, is Kirkwall.