Reidar Hjermstad (born 10 October 1937) is a former Norwegian cross-country skier and biathlete who competed in the 1960s and 1970s. In 1963, Hjermstad won two events at the Lahti, Finland ski games, earning a . For his Lahti successes, Hjermstad earned the Norwegian Sportsperson of the Year (Norwegian: Årets Idrettsnavn) in 1963. Hjermstad represented Norway in the winter olympics 3 times: Grenoble, France in 1964, Innsbruck, Austria in 1968) and Sapporo, Japan 1972.His best Olympic result was 4th place in the 50 km at the 1972 Winter Olympics in Sapporo, Japan.