William Mann
William Mann is the name of the following people:
- William Mann (music critic) ( William Somervell Mann ; 1924–1989), British musicologist and music critic
- William Abram Mann (1854–1934), American major general
- William d'Alton Mann (1839–1920), American businessman and newspaper publisher
- William C. Mann (1934-2004), American computational linguist
- William Hodges Mann (1843–1927), American politician
- William J. Mann (* 1963), American writer, biographer and film historian
- William Julius Mann ( Wilhelm Julius Mann ; 1819-1892), German-American theologian