The Lewis chessmen or Uig chessmen, named after the island or the bay where they were found, are a group of distinctive 12th century chess pieces, along with other game pieces, most of which are carved from walrus ivory. Discovered in 1831 on Lewis in the Outer Hebrides of Scotland, they may constitute some of the few complete, surviving medieval chess sets, although it is not clear if a single complete period-accurate set can be assembled from the pieces. When found, the hoard contained 94 objects: 78 chess pieces, 14 tablemen and one belt buckle. Today, 82 pieces are owned and usually exhibited by the British Museum in London, and the remaining 11 are at the National Museum of Scotland in Edinburgh; one chesspiece is owned privately.

Uig, also known as Sgìr' Ùig, is a civil parish and community in the west of the Isle of Lewis in the Outer Hebrides, Scotland. The Parish of Uig is one of the four civil parishes of the Isle of Lewis. It contains the districts of Carloway, East Uig, Bernera and West Uig. The name derives from the Norse word Vik meaning 'a bay'.