Robin Sadler (born March 1, 1955) is a Canadian former professional defenceman. He was drafted in the first round, ninth overall, of the 1975 NHL Amateur Draft by the Montreal Canadiens; in addition, he was drafted in the second round, 18th overall, of the 1975 WHA Amateur Draft by the Michigan Stags. However, Sadler never played in either the National Hockey League or the World Hockey Association.