In Germanic mythology, Sigmund is a hero whose story is told in the Völsunga saga. He and his sister, Signý, are the children of Völsung and his wife Hljod. Sigmund is best known as the father of Sigurð the dragon-slayer, though Sigurð's tale has almost no connections to the Völsung cycle except that he was a dragonslayer.

The Völsunga saga is a legendary saga, a late 13th-century prose rendition in Old Norse of the origin and decline of the Völsung clan. It is one of the most famous legendary sagas and an example of a "heroic saga" that deals with Germanic heroic legend.