Triathlon made its official debut at the 2000 Summer Olympics in Sydney, Australia.

This sporting event was held at the Sydney Opera House.

Forty-eight triathletes contested the female event on September 16, while fifty-two contested the male event on September 17, making up a total of 100 competitors.

Five nations won medals in the two inaugural triathlon events.

Switzerland was the only nation to earn more than one, winning a gold and a bronze in the women's competition.