Eugen Ingebretsen (30 December 1884 – 11 January 1939) was a Norwegian gymnast who competed in the 1906 Intercalated Games, in the 1908 Summer Olympics, and in the 1912 Summer Olympics. At the 1906 Intercalated Games in Athens, he was a member of the Norwegian team, which won the gold medal in the gymnastics team event. In 1908 he won a silver medal in the gymnastics team event with the Norwegian team. He also competed in the all-around event, but his result is unknown.