Egil's Saga or Egill's saga is an Icelandic saga (family saga) on the lives of the clan of Egill Skallagrímsson (Anglicised as Egil Skallagrimsson), an Icelandic farmer, viking and skald. The saga spans the years c. 850–1000 and traces the family history from Egil's grandfather to his offspring.
Its oldest manuscript (a fragment) dates back to 1240 AD, and comprises the sole source of information on the exploits of Egil, whose life is not historically recorded. Stylistic and other similarities between Egil's Saga and Heimskringla (Heimskringla is a collection of sagas about Swedish and Norwegian kings) have led many scholars to believe that they were the work of the same author, Snorri Sturluson. 

Snorri Sturluson (1179 – 1241) was an Icelandic historian, poet, and politician. He was elected twice as lawspeaker to the Icelandic parliament, the Althing. He was the author of the Prose Edda or Younger Edda, which consists of Gylfaginning ("the fooling of Gylfi"), a narrative of Norse mythology, the Skáldskaparmál, a book of poetic language, and the Háttatal, a list of verse forms. He was also the author of the Heimskringla, a history of the Norwegian kings that begins with legendary material in Ynglinga saga and moves through to early medieval Scandinavian history. For stylistic and methodological reasons, Snorri is often taken to be the author of Egil's saga.

Translated by W. C. Green.