Reidar Andersen (20 April 1911 – 15 December 1991) was a Norwegian ski jumper who competed in the 1930s.

He won a ski jumping bronze at the 1936 Winter Olympics in Garmisch-Partenkirchen.

On 14 and 15 March 1935 he set a total of three world records (93, 98 and 99 metres) on Bloudkova velikanka hill in Planica, Kingdom of Yugoslavia.

[1][2] Andersen won the Holmenkollen ski festival's men's ski jumping competition in 1936, 1937, and 1938, the only person to ever win this event three straight years.

In 1938, Andersen shared the Holmenkollen medal with fellow Norwegian Johan R. Henriksen.