Soay (pronounced "soy") is the name of several Scottish islands. It is Sòdhaigh (sometimes anglicised "Soaigh") in Scottish Gaelic, and comes from the Old Norse so-ey meaning "island of sheep". It may refer to:
Soay, Inner Hebrides off south west Skye Soay, St Kilda in the St Kilda group The neighbouring islands of Soay Mòr and Soay Beag in the Outer Hebrides
It may also refer to: Soay sheep the native, primitive sheep from St Kilda
See also Soa Island, south of Iona, Scotland