William Massey (1856–1925) was Prime Minister of New Zealand.

William Massey may also refer to:

• Bill Massey (baseball) (1871–1940), baseball player in 1894
• Bill Massey (softball) (1936–2020), New Zealand softball player, coach and umpire
• William Massey (calligrapher) (1691–1764), author of The origin and progress of letters (London: J. Johnson, 1763).
• William Massey (cricketer) (1846–1899), played cricket for Somerset and Lancashire
• William Massey (rower) (1817–1898), rowed and played cricket for Cambridge University
• William A. Massey (politician) (1856–1914), U.S. Senator
• William A. Massey (mathematician) (born 1956), American mathematician
• William Clifford Massey (1917–1974), American anthropologist
• William Nathaniel Massey (1809–1881), British author and politician
• William S. Massey (1920–2017), American mathematician

Topics referred to by the same term

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