Ronald Stein (April 12, 1930 – August 15, 1988) was an American film composer.
Born in St. Louis, Missouri, Stein wrote scores for numerous low budget horror and exploitation films during the 1950s and 1960s, many of which were released by American International Pictures. These films included It Conquered the World (1956), Not of This Earth (1957), Reform School Girl (1957), Attack of the 50 Foot Woman (1958), Dinosaurus! (1960), The Premature Burial (1962), Of Love and Desire (1963), The Terror (1963), Dementia 13 (1963) and Spider Baby (1968). He also occasionally provided scores for major studio productions such as Francis Ford Coppola's The Rain People (1969) and Richard Rush's Getting Straight (1970), as well as the pilot episode of the short-lived television series, Gunslinger(1961).
Stein taught composition at California State University, Northridge. Stein also taught composition, arranging, orchestration and theory at the University of Colorado Denver in the mid to late 1980s.
His song "Pigs Go Home" was sampled by Dr. Dre for the Eminem song "Guilty Conscience".
Stein died from pancreatic cancer.