At the Olympics, Lemaitre didn't reach the 100 m final after finishing 3rd in his semi-final in 10.07, although it was his season's best. However, in the 200 m, he qualified for the final after clocking 20.01 in the semi-final behind America's LaShawn Merritt. In the 200 metres final, Lemaitre won the bronze medal in a 20.12 clocking, just 3 milliseconds ahead of Great Britain's Adam Gemili, with the podium spot determined in a photo finish. In the process, Lemaitre became the first French athlete to win a medal in the event since Abdoulaye Seye in 1960.