Marcia Ralston (19 September 1906 – 23 November 1988) was an Australian born actress who appeared in Hollywood films in the 1930s and 1940s. She was married to Phil Harris between 1927 and 1940.

In Australia

Born Marie Mascotte Ralston, her father was well known Australian singer and actor John Ralston. She attended Bethlehem College, Ashfield and won third place in a 1926 Miss Australia competition. She met band leader Phil Harris in Australia in 1927, and they married, then moving to California. She had a Warner Bros contract by 1937, and appeared in a number of supporting and leading roles, mostly in B films.

Career in Hollywood

Her marriage to Harris ended in divorce in 1940. She continued to act in various bit and supporting roles until the late 1940s. Work after this included instructing for the Arthur Murray dance studio in the early 1950s. She married Bud Henderson in 1954. Henderson's sister, Betty, was married to actor Robert Young. The connection resulted in an occasional supporting role as Nurse Donnelly, in the TV series Marcus Welby, M.D. in the early 1970s. She died at Rancho Mirage, California in 1988.