Bjørnstjerne Martinius Bjørnson (Norwegian pronunciation: [ˈbjøːɳˈstjæːɳə ˈbjøːɳˈʂɔn]; 8 December 1832 – 26 April 1910) was a Norwegian writer who received the 1903 Nobel Prize in Literature "as a tribute to his noble, magnificent and versatile poetry, which has always been distinguished by both the freshness of its inspiration and the rare purity of its spirit", becoming the first Norwegian Nobel laureate. Bjørnson is considered to be one of The Four Greats (De Fire Store) among Norwegian writers, the others being Henrik Ibsen, Jonas Lie, and Alexander Kielland. Bjørnson is also celebrated for his lyrics to the Norwegian National Anthem, "Ja, vi elsker dette landet".
Bjørnson was born at the farmstead of Bjørgan in Kvikne, a secluded village in the Østerdalen district, some sixty miles south of Trondheim. In 1837 Bjørnson's father Peder Bjørnson, who was the pastor of Kvikne, was transferred to the parish of Nesset, outside Molde in Romsdal. It was in this scenic district that Bjørnson spent his childhood.
Bjornson, Bjørnson, Bjørnsen, Björnsson and variations can refer to the following people: