Don Duffy is an Australian rugby league footballer who played in the 1980s and 1990s.
He played for the Parramatta Eels in the New South Wales Rugby League (NSWRL) competition.
Duffy made his first-grade debut for Parramatta against the Canberra Raiders in Round 2 1983 at Belmore Oval.
Parramatta would go on to reach the 1983 NSWRL grand final in a rematch against Manly from the previous season.
In 1990, Duffy joined Rugby Football League Championship First Division side Warrington.