William C. Marshall (January 16, 1885 – April 25, 1943) was a Ottoman Empire-born American cinematographer. His career began in 1916 and ended in 1930. He served as cinematographer on the starring vehicles for such stars as Annette Kellerman, Marguerite Clark, Billie Burke, Elsie Ferguson, Wallace Reid, Rudolph Valentino, and Clara Bow. He died in Los Angeles in 1943 at age 58.