Bob Nadin (born March 15, 1933) is a Canadian retired ice hockey referee and administrator.
He refereed at the 1972 Winter Olympics, and served as a referee supervisor for the International Ice Hockey Federation (IIHF), the National Hockey League, and the Canadian Amateur Hockey Association.
He was involved with the Winter Olympic Games every Olympiad from 1972 until 2012, and was honoured by the International Olympic Committee with the Pierre de Coubertin medal.
The IIHF honoured Nadin with the Paul Loicq Award, and inducted him into the IIHF Hall of Fame.