Triathlon had its Summer Olympics debut at the 2000 Games, in Sydney, when men's and women's individual events were first held, and has been contested since then. In 2021, at the delayed 2020 Summer Olympics a mixed team relay event was held for the first time. The sport, and its Olympic events, are governed by the International Triathlon Union, known since 2019 as World Triathlon.

Simon St. Quentin Whitfield is a Canadian retired Olympic triathlon champion. Whitfield won ten consecutive Canadian Triathlon Championships titles and carried the Canadian national flag during the 2000 Summer Olympics closing ceremony in Sydney, where he had won his gold medal, and the opening ceremony at the 2012 Summer Olympics in London, making him one of few Canadian athletes to be honoured twice as Olympic flag bearer.