Heiðarvíga saga (listen^ⓘ) or The Story of the Heath-Slayings is one of the Icelanders' sagas. It is badly preserved; 12 leaves of the only surviving manuscript were destroyed along with their only copy in the fire of Copenhagen in 1728. The content of the destroyed portion is only known through a summary written from memory by Icelandic scholar Jón Grunnvíkingur (1705–1779). This is the only form in which the saga's contents survive today. The saga has been taken by some scholars as possibly among the oldest Icelanders' sagas.

The saga tells of the descendants of Egil Skallagrímsson and the long-standing disputes and conflicts which culminated in the battle and subsequent slayings on the heath, the eponymous Heath-Slayings (Heiðarvíg).^[1]