O'Neill, Susie (1973-...), is an Australian swimmer who has won more gold medals than any other Australian swimmer. At the 1992 Olympic Games, O'Neill won the bronze medal for the 200-meter butterfly event. At the 1996 Olympic Games, she won the 200-meter butterfly and was a member of the winning 400-meter medley and 800-meter freestyle relay teams. At the 2000 Olympics, O'Neill won the 200-meter freestyle event. She finished second in the 200-meter butterfly and was a member of the 400-meter medley and 800-meter freestyle relay teams that finished second.