The Mixed relay triathlon at the 2020 Summer Olympics took place at the Odaiba Marine Park in Tokyo on 31 July 2021.
The mixed team event featured teams of four (two men and two women). Each athlete performed a triathlon of swim, cycle, and a run in a relay format.
Kristian Blummenfelt and Flora Duffy, gold medallists in men's and women's individual events, were unable to participating since Norway and Bermuda failed to qualified for this event, meaning no double gold for both countries. Austria and South Africa were forced to pulled out after some of its athletes sustaining injury during training or individual events and couldn't find their replacement.
Alex Yee, silver medallist of the men's individual event, brought Great Britain team home for their gold medal. Morgan Pearson and Vincent Luis anchored the silver and bronze medals for United States and France teams respectively. Mexico's Irving Pérez became the final athlete to finish the race.