Torstein Pettersen Raaby (6 October 1918 – 23 March 1964) was a Norwegian telegrapher, resistance fighter and explorer.

[2] During World War II he became a Secret Intelligence Service officer, having entered training in 1943.

His reports were instrumental helping the RAF to find and permanently disable the battleship Tirpitz.

[5][6] After the expedition he returned to northern Norway, until he, again as a radio operator, lived on the remote Bear Island, far north of the Arctic Circle.

[7] Raaby died near Alert, Nunavut of a heart condition while in route on an expedition to reach the North Pole on skis.