The Ynglinga saga is a legendary saga, originally written in Old Norse by the Icelandic poet Snorri Sturluson about 1225. He based it on an earlier Ynglingatal which is attributed to the Norwegian 9th century skald Þjóðólfr of Hvinir, and which also appears in Historia Norwegiae.

The Ynglinga saga is the first part of Snorri's history of the ancient Norse kings, the Heimskringla. It tells the most ancient part of the story of the House of Ynglings (the Scylfings of Beowulf). It was first translated into English and published in 1844.

The saga deals with the arrival of the Norse gods to Scandinavia and how Freyr founded the Swedish Yngling dynasty at Uppsala. Then the saga follows the line of Swedish kings until Ingjald ill-ruler, after which the descendants settled in Norway and became the ancestors of the Norwegian king Harald Fairhair.