Magnus is a male given name. Notable people with the name include:
Magnus (Roman usurper) (died 235)
Magnus (consul 460) (c. 390 or 405–475)
Magnus Forteman, 8th–9th century Frisian leader
Magnus (bishop), Roman Catholic Bishop of Turku between 1291 and 1308
Magnus, Prince of Anhalt-Köthen (1455–1524)
Magnus W. Alexander, German engineer
Magnus Arvedson, Swedish ice hockey player
Magnus Arvidsson, several people
Magnus Bäckstedt, Swedish road cyclist
Magnus Bahne, Finnish footballer
Magnus Barthelsson, Swedish guitarist
Magnus Beronius, Swedish Archbishop
Magnus Betnér, Swedish comedian
Magnus Brechtken, German historian
Magnus Carlsen, Norwegian chess grandmaster, former world chess champion and No. 1 ranked player in the world
Magnus Cormack, Australian politician
Magnus Ditlev (born 1997), Danish Triathlete
Magnus Ehrencrona (born 1978), Swedish politician
Magnus Erlendsson, Earl of Orkney
Magnus Faxén, Swedish diplomat and journalist
Magnus Hallenborg, Swedish diplomat
Magnus Hirschfeld, German physician and sexologist
Magnus Ilmjärv, Estonian historian
Magnus Kirt, Estonian javelin thrower
Magnus Körner (1808–1864), Swedish artist and scientific illustrator
Magnus Larsson, former professional tennis player from Sweden
Magnus Lekven, Norwegian footballer
Magnus Lindberg, Finnish composer
Magnus Lundgren (born 1964), Swedish sailor
Magnus Magnusson, Icelandic-born BBC personality and Mastermind quiz-master
Magnús Árni Magnússon (born 1968), Icelandic politician
Magnus Malan, South African soldier and politician
Magnus Manske, German biochemist and developer, developed first version of MediaWiki software
Magnus Midtbø, Norwegian rock climber
Magnus Norman, Swedish former tennis player
Magnús Óláfsson, King of Mann and the Isles
Magnus Olofsson (born 1965), Swedish engineer
Magnus Olson, Swedish Army officer
Magnús Ver Magnússon, Icelandic four-time World's Strongest Man champion
Magnus Pyke (1908–1992), British scientist and media figure
Magnus Lewis Robinson (1852–1918), American newspaper editor and Black community leader
Magnus Samuelsson, Swedish strongman and former World's Strongest Man
Magnús Scheving, creator and co-star of the children's television show LazyTown
Magnús Orri Schram (born 1972), Icelandic politician
Magnus Büchel, Liechtenstein judoka
Magnus Pääjärvi-Svensson, Swedish hockey player
Magnus Rosén, ex-HammerFall bassist
Magnus Sjöberg, Swedish jurist
Magnus Vahlquist, Swedish diplomat
Quaiapen (1603–1676), also known as Magnus, Native American leader in Rhode Island.