John Olsen (born 1945) was premier of South Australia, 1996–2001.
John Olsen may also refer to: John W. Olsen (born 1955), American archaeologist John Olsen (Australian artist) (1928–2023), Australian landscape and abstract artist John Olsen (Danish artist) (1938–2019), Danish artist specializing in sculpture John Olsen (filmmaker) (1888–1959), Danish producer, screenwriter and studio owner John Olsen (footballer) (1928–2001), Norwegian footballer Jack Olsen (1925–2002), American journalist and author
See also John Olson (disambiguation) Jon Olsen (born 1969), American freestyle swimmer Jon Olsson (born 1982), skier