Mongolia competed at the 2016 Summer Olympics in Rio de Janeiro, Brazil, from 5 to 21 August 2016. Since the nation made its debut in 1964, Mongolian athletes had appeared in every edition of the Summer Olympic Games, with the exception of the 1984 Summer Olympics in Los Angeles, because of its partial support to the Soviet boycott.

During the Parade of Nations within the Rio de Janeiro 2016 Summer Olympics opening ceremony, athletes and officials from each participating team marched in the Maracanã Stadium preceded by their flag and placard bearer. Each flag bearer had been chosen either by the team's National Olympic Committee or by the athletes themselves.