Eugen Ingebretsen (December 30, 1884 – January 11, 1939) was a Norwegian gymnast who competed in the 1906 Summer Olympics, in the 1908 Summer Olympics, and in the 1912 Summer Olympics.
At the 1906 Summer Olympics 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.
Four years later he was part of the Norwegian gymnastics team, which won the bronze medal in the gymnastics men's team, Swedish system event.