James "Jimmy" Dorsey (February 29, 1904 - June 12, 1957) was a prominent jazz clarinetist, saxophonist and big band leader.
Jimmy Dorsey was born in Shenandoah, Pennsylvania, the son of a music teacher and older brother of Tommy Dorsey who also became a prominent musician. He played trumpet in his youth, appearing on stage in a Vaudeville act as early as 1913. He switched to saxophone in 1915, and then learned to double on clarinet.