Steinar Amundsen (4 July 1945 – 16 June 2022) was a Norwegian sprint canoeist who mostly competed in four-man events. He won a world title in 1970 and 1975, a European title in 1969, and an Olympic gold medal in 1968, and a bronze medal at the 1972 Games. His younger brother Harald was also an Olympic canoeist.
Amundsen's achievements also include winning four Nordic championships and 13 national titles. He received the Fearnley Olympic award in 1968.