Marlyn Mason (born August 7, 1940, in San Fernando, California) is an American actress, producer, screenwriter. Mason played Nikki Bell in Longstreet (1971-1972), which starred James Franciscus. Her other acting credits include roles in My Three Sons, Burke's Law, Kentucky Jones, Bonanza, Ben Casey, Dr. Kildare (in a recurring role), Laredo, Occasional Wife, The Big Valley, The Man from U.N.C.L.E., I Spy, Laredo, Hogan's Heroes, The F.B.I., Mission Impossible, etc.
Her most recent appearances have been in the television movie Fifteen and Pregnant, and the 2008 film Model Rules, directed by Ray Nomoto Robison. She was married to musician J. Raymond Henderson from 1960 to 1962; she married Lee Harman in 1972.