Derek Chadwick (born 21 March 1941) is an Australian former sportsman, playing both first-class cricket with Western Australia and Australian rules football for East Perth in the Western Australian Football League (WAFL).
Chadwick was a right-handed opening batsman who made 4082 runs at 34.30 during his cricketing career, with 9 centuries.
As a footballer he was a wingman and played a at-the-time club record 269 games for East Perth, winning their best and fairest award, the F.D.
In 1964 he won a Simpson Medal for his performances with the Western Australian state team in tours of Melbourne and Adelaide, and was inducted into the WAFL Hall of Fame in 2004.
This biographical article related to an Australian cricket person born in the 1940s is a stub.