William Bolcom (born 1938) is an American composer of chamber, operatic, and symphonic music.
As a pianist, Bolcom has performed and recorded his own work frequently in collaboration with his wife, mezzo-soprano Joan Morris. Bolcom and Morris have recorded twenty albums together.
Bolcom's setting of William Blake's Songs of Innocence and of Experience, a full evening's work for soloists, choruses, and orchestra culminated 25 years of work on the piece. Its premiere at the Stuttgart Opera in 1984 was followed by performances in Ann Arbor, Chicago's Grant Park, the Brooklyn Academy of Music, St. Louis, Carnegie Hall, and London's Royal Festival Hall, the latter performed by the BBC Symphony Orchestra under the direction of Leonard Slatkin.