William Arnott may refer to:
William Arnott (biscuit manufacturer) (1827–1901), Australian manufacturer and businessman William Arnott (politician) (1832–1907), American farmer and politician Bob Arnott or William Robert Arnott (1922–2016), Australian skier W. Geoffrey Arnott (1930–2010), British Hellenist Sir William Melville Arnott (1909–1999), Scottish academic Will Arnott (1999–2024), British boccia player
See also William Arnot (disambiguation) William Arnett (disambiguation)