Frithjof Andersen (5 April 1893 – 24 July 1975) is a Norwegian wrestler and Olympic medalist in Greco-Roman wrestling, from Oslo.
Andersen competed at the 1920 Summer Olympics in Antwerp, where he won a bronze medal in Greco-Roman wrestling, the lightweight class. His bronze medal was NorwayâÂÂs first Olympic medal in Greco-Roman wrestling.