Reidar Engell Olsen (born 10 May 1933) was a Norwegian politician for the Labour Party.
He served as a deputy representative to the Parliament of Norway from Telemark during the terms 1969–1973 and 1973–1977.
In total he met during 9 days of parliamentary session.From 1973 to 1979, during Bratteli's Second Cabinet and Nordli's Cabinet, Engell Olsen was appointed State Secretary in the Ministry of Industry.