Bjørnson is a Norwegian surname with the literal meaning "Son of Bjørn". Bjornson, Bjørnson, Bjørnsen, Björnsson and variations can refer to the following people:
Icelanders
Ármann Smári Björnsson (born 1981), Icelandic footballer
Björn Th. Björnsson (1922-2007), Icelandic writer
Georgia Björnsson (1884–1957), Danish-born wife of Sveinn Björnsson, first president of Iceland Hafþór Júlíus Björnsson (born 1988), Icelandic strongman and actor Sveinn Björnsson (1881-1952), first president of Iceland Sveinn Birkir Björnsson (born 1976), editor of The Reykjavík Grapevine
Norwegians
Bjørnstjerne Bjørnson (1832-1910), Norwegian writer and a 1903 Nobel Prize in Literature laureate Bjørn Bjørnson (1859-1942), Norwegian stage actor and theatre director, son of Bjørnstjerne Bjørnson Gudrød Bjørnsson, Norwegian politician in Middle Ages, grandfather of Saint Olaf Ivar Bjørnson (born 1977), Norwegian musician in Black Metal band Enslaved Øyvind Bjørnson, (1950–2007) was Norwegian historian