Unst is one of the North Isles of the Shetland Islands, Scotland. It is the northernmost of the inhabited British Isles and is the third-largest island in Shetland after Mainland and Yell. It has an area of 46 sq mi (120 km2).

Norn is an extinct North Germanic language that was spoken in the Northern Isles off the north coast of mainland Scotland and in Caithness in the far north of the Scottish mainland. After Orkney and Shetland were pledged to Scotland by Norway in 1468–69, it was gradually replaced by Scots. Norn is thought to have become extinct around 1850, after the death of Walter Sutherland, the language's last known speaker, though there are claims the language persisted as late as the 20th century.