Gunnar Andreassen (Fredrikstad, January 5, 1913 – July 23, 2002) was a Norwegianfootball player and manager. He played on Fredrikstad FK from 1933 to 1950, except during the World War IIGerman occupation of Norway. He appeared twice on the Norwegian national football team, in 1939 and 1945. The latter of his national team appearances was in the first postwar Norwegian national game (and the first since 1939, as the Norwegian national team had been inactive during the occupation). Andreassen managed Fredrikstad from 1953 to 1956 and Østsiden IL from 1959 to 1962.
