John Olsen (disambiguation)

John Olsen 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) (born 1938), Danish artist specializing in sculpture
 * John Olsen (filmmaker) (1888–1959), Danish producer, screenwriter and studio owner
 * John Olsen (footballer)
 * Jack Olsen (1925–2002), American journalist and author