William Albert Lunn (17 September 1926 – 22 December 1996), commonly known as Bert Lunn or Bill Lunn, was a New Zealand rugby union player.

Lunn played 47 first class games, of which all but six were for Otago. A flanker, he played in two matches for the New Zealand national side, the All Blacks, both of them tests against the touring Australian team in 1949.^[1]