Simon Thompson (born 10 December 1977, in Melbourne) is an athlete from Australia.
Thompson trains with the Tridents Triathlon Club in Canberra and is coached by Ben Gathercole.
Thompson, who was named as the reserve for the Australian Melbourne Commonwealth Games 2006 team, competed in the place of Greg Bennett.
He controlled much of the race to assist his Australian teammates, Brad Kahlefeldt (1st) and Peter Robertson (3rd).
Other notable achievements include Triathlon World Cup victory at Mooloolaba 2005 and winning the Australian long course title 2005.