James G. Aton (1925 – September 16, 2008), best known as Jim Aton or Jimmy Aton, was an American jazz bassist, pianist, vocalist and composer. He worked with numerous notable artists including Billie Holiday, Anita O'Day and Bill Evans. He appeared in films such as Bop Girl Goes Calypso (1957) with the Bobby Troup Trio, Roustabout (1964) with Elvis Presley and Barbara Stanwyck, and in They Shoot Horses, Don’t They? (1969) with Jane Fonda.