Ronald Stein (April 12, 1930 – August 15, 1988) was an American film composer.
Born in St. Louis, Missouri, Stein wrote scores for many low budget horror and exploitation films during the 1950s and 1960s, most of which were released by American International Pictures. These included It Conquered the World, Attack of the Crab Monsters, Invasion of the Saucer Men, Attack of the 50 Foot Woman, Hot Rod Gang, The Premature Burial and The Haunted Palace. He also provided scores for major studio productions such as Francis Ford Coppola's The Rain People, and Richard Rush's Getting Straight.
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 "Go Home Pigs" was sampled by rapper Eminem for his 1999 song "Guilty Conscience".
Some of Stein's papers and scores, especially for the films Not of This Earth and Of Love and Desire can be found in the archives of the Music Library at Washington University in St. Louis.
Stein died from pancreatic cancer in Los Angeles, California, in 1988. His son, Victor Warren (birth name, Victor Warren Stein), is an actor, writer, director, and producer with his own production company Glydascope inc in Los Angeles, California