Owen Marsh was an American camera operator and technician.

The youngest son of famed MGM cinematographer Ollie Marsh, Owen Marsh spent his childhood on movie sets, even appearing in two films as a child actor in the 1930s. Marsh was destined to have a career behind the camera, first working in film labs, then with MGM's special visual effects department, before becoming an assistant cameraman on Duel in the Sun (1946). He would continue to assist on Love Me Tender (1956), Ben-Hur (1959), Cimarron (1960), Mutiny on the Bounty (1962), and The Greatest Story Ever Told (1965) before landing his first operator job on Assault on a Queen (1966) with Frank Sinatra, working specifically as the underwater camera operator.

Marsh would spend the next two decades as a prolific camera operator working on films such as Night of the Lepus (1972), Westworld (1973), Papillion (1973), Death Wish (1974), Alice Doesn't Live Here Anymore (1974), The Towering Inferno (1974), King Kong (1976), and The Jazz Singer (1980). In addition to a number of TV movies, he also operated on the television series The Brady Bunch, Emergency!, Dallas, Flying High, and Beauty and the Beast.

Marsh died January 10, 2021, in Portland, Oregon. He was 90.