Leon Stein (September 18, 1910 in Chicago – May 9, 2002 in Laguna Hills, California) was an American composer and music analyst.
Stein attended DePaul University, where he achieved his MM in 1935 and his Ph.D. in 1949; he studied under Leo Sowerby, Eric DeLamarter, Frederick Stock, and Hans Lange. He taught at DePaul from 1931 to 1978; he was dean of the School of Music there between 1966 and 1976. Stein was also Director of the Graduate Division at De Paul University of Music. College of Jewish Studies, Chicago. He directed a number of Chicago ensembles, including the City Symphony of Chicago.
Stein's compositions were modernist in character; his works for saxophone are his most popular pieces. He also wrote on music, particularly Jewish music. His manuscripts are held in the Richardson Library at DePaul.
He has two sons.