Magnussen is a surname. Notable people with the surname include:
Arne Magnussen (1884–1970), Norwegian trade unionist, newspaper editor and politician Billy Magnussen (born 1985), American actor Bjørn Magnussen (born 1998), Norwegian speed skater Davur Juul Magnussen, Faroese trombonist Einar Magnussen (1931–2004), Norwegian economist and politician Fritz Magnussen (1878–1920), Danish film director and screenwriter Harro Magnussen (1861–1908), German sculptor James Magnussen (born 1991), Australian swimmer Jan Magnussen (born 1973), Danish racing driver Jon Magnussen (born 1959), Norwegian academic Karen Magnussen, OC (born 1952), Canadian figure skater Karin Magnussen (1908–1997), German biologist, teacher and researcher Kevin Magnussen (born 1992), Danish racing driver Ryan Magnussen, American businessperson and media entrepreneur Trond Magnussen (born 1973), Norwegian ice hockey player Ulf Magnussen (born 1946), Norwegian handball player
Fictional characters Charles Augustus Magnussen, a character in the television series Sherlock
See also Murder of Martine Vik Magnussen involves the rape and murder of a 23-year-old Norwegian female business student, Martine Vik Magnussen Magnusson (disambiguation)