William Mann may refer to:
William Mann (astronomer) (1817–1873), English astronomer active in the Cape Colony William Mann (MP), English politician in the House of Commons, 1621–1625 William Mann (settler) (1610–1650), original settler of Providence, Rhode Island William Abram Mann (1854–1934), general officer in the United States Army William d'Alton Mann (1839–1920), American Civil War soldier and newspaper and magazine publisher William C. Mann "Bill" (died 2004), American computational linguist William Mann (RAF officer) (1899–1966), senior Royal Air Force officer and flying ace Billy Mann (William H. Mann), record producer/singer/songwriter William Hodges Mann (1843–1927), American politician William Mann (cricketer) (1878–1938), English cricketer William J. Mann, American author and gay historian William Mann (Australian politician) (1875–1951), Australian politician William Julius Mann (1819–1892), American Lutheran theologian and author William M. Mann (1886–1960), entomologist and director of the National Zoo, Washington, D.C., 1925–1956 William Mann (mathematician) (1920–2006), American mathematician William Mann (critic) (1924–1989), British music critic for The Times William Mann (rugby union), English international rugby union player Billy Mann (rugby union), Australian international rugby union player
See also Mann (surname)