Sandavágur is a city on the south coast of the Faroese island of Vágar. The name Sandavágur means sandy bay and refers to the sandy beach which used to be much larger than present. From one point in Sandavágur you can get a view of all the southern islands in the Faroes. Sandavágur used to be a municipality until 1 January 2009, when it fused together with the neighbour village Miðvágur into the new Vágar municipality.

Vágar is one of the 18 islands in the archipelago of the Faroe Islands and the most westerly of the large islands. With a size of 178 square kilometres, it ranks third in size, behind Streymoy and Eysturoy. Vágar region also comprises the island of Mykines.