William Lunn may refer to:
William Lunn (politician) (1872–1942), English Labour Party politician William Lunn (educator) (1796–1886), Canadian educator, businessman, and politician William Lunn (rugby union) (1926–1996), New Zealand rugby union player William Lunn (freestyle skier) (fl. 2010s) in FIS Freestyle World Ski Championships 2011 – Men's ski cross William Lunn (priest) (died 1747), Archdeacon of Huntingdon and Wisbech
See also Billy Lunn (disambiguation)