Laxdæla saga (Icelandic pronunciation: [ˈläːks.täi̯lɐ ˈsaːɣa]); also Laxdœla saga, Laxdoela saga, Laxdaela saga, or The Saga of the People of Laxárdalr) is one of the Icelanders' sagas. Written in the 13th century, it tells of people in the Breiðafjörður area of Iceland from the late 9th century to the early 11th century. The saga particularly focuses on a love triangle between Guðrún Ósvífrsdóttir, Kjartan Ólafsson and Bolli Þorleiksson. Kjartan and Bolli grow up together as close friends but the love they both have for Guðrún causes enmity between them and, in the end, their deaths.
Second only to Njáls saga in the number of medieval manuscripts preserved, Laxdæla saga remains popular and appreciated for its poetic beauty and pathetic sentiment.
As is the case with the other Icelanders' sagas, the author of Laxdæla saga is unknown. Since the saga has often been regarded as an unusually feminine saga, it has been speculated that it was composed by a woman. The extensive knowledge the author shows of locations and conditions in the Breiðafjörður area show that the author must have lived in Western Iceland. Internal evidence shows that the saga must have been composed sometime in the period 1230-1260.
On several occasions, Laxdæla saga explicitly cites what appear to be written sources. It twice refers to the writings of Ari Þorgilsson, once to a lost Þorgils saga Höllusonar and once to a Njarðvíkinga saga, perhaps an alternative name for Gunnars þáttr Þiðrandabana. The author was also likely familiar with a number of other written historical sources. Nevertheless, the main sources of the author must have been oral traditions, which he or she fleshed out and shaped according to his or her tastes.
Laxdæla saga is preserved in numerous manuscripts. The oldest manuscript to contain the saga in its entirety is Möðruvallabók dating to the mid-14th century. There are also five vellum fragments, the oldest dating to ca. 1250, and numerous young paper manuscripts, some of which are valuable for textual criticism of the saga.