Leon Stein (1910-2002) was an American composer. Stein attended DePaul University (M.M. 1935, Ph.D. 1949). He studied with Leo Sowerby, Eric DeLamarter, Frederick Stock, and Hans Lange. He taught at DePaul from 1931 to 1978, and served as Dean of the School of Music between 1966 and 1976. He directed a number of Chicago ensembles, including the City Symphony of Chicago. His manuscripts are held in the Richardson Library at DePaul.