William Waterhouse may refer to:
William Waterhouse (bassoonist) (1931–2007), English bassoonist, musicologist and academic William Waterhouse (violinist) (1917–2003), Canadian violinist William C. Waterhouse (1941–2016), American mathematician Bill Waterhouse (1922–2019), Australian bookmaker, businessman and former barrister William Glenn Waterhouse, American Olympic sailor
See also John William Waterhouse (1849–1917), English painter William H. Waterhouse House, Florida