Greg Cox is an Australian former rugby league footballer who played in the 1970s and 1980s. He played for Balmain, Western Suburbs and Cronulla-Sutherland in the New South Wales Rugby League (NSWRL) competition.

Cox made his first grade debut for Balmain in 1976 and finished the club's top point scorer. In 1977, Balmain reached the semi-finals against Eastern Suburbs but were defeated 26–2. Cox again finished as Balmain's top point scorer with 187 points.

In 1978, Cox joined Cronulla but only made 5 appearances during the season and missed out on playing in the club's grand final defeat and subsequent replay. In 1979, Cronulla again made the finals and Cox played in the semi-final defeat against Canterbury.

In 1981, Cox joined Western Suburbs. Cox finished as the club's top point scorer in 1982 and played in the teams minor preliminary final defeat against Eastern Suburbs. Cox played with Wests until the end of 1984 but his final two seasons at the club ended with the side finishing last on the table.^[2][3][4]