David Knox is an Australian former rugby union footballer and coach.

Knox was capped 13 times for Australia and was a member of the 1991 Australian World Cup champion squad. He also featured in eight Premiership winning teams with Randwick.

He also played with Petrarca Padova (1986-1989) where he won the 1987 National Championship, Livorno Rugby (1990-1992), Bristol Rugby Club (1998) and Racing Club, Narbonne (1999).