Susie O'Neill (born 2 August 1973) was an Australian swimmer from Brisbane, Queensland who won the 200m Butterfly at the 1996 Atlanta Olympics and the 200m Freestyle in Sydney. After winning a Gold and a Silver medal in her first attendance at an international competition at the 1990 Commonwealth Games, O'Neill never failed to win a medal at any international meet she attended, right up until her final Olympics in front of a home crowd in Australia.