Oleksiak began her Olympics swimming the anchor leg for Canada in the 4×100 m freestyle relay. The team qualified for the final in third place and when Oleksiak dove in to swim the last 100 m she was behind familiar rival Simone Manuel but managed to overtake her in the last touch for second place to win Canada's first medal of the games. Oleksiak next competed in the 200 m freestyle, an event she had not participated in during Rio Olympics. She had the fourth-fastest time in the heats, but only sixth in the semi-finals. In the event final, she set a new personal best time of 1:54.70 to take the bronze medal. This was her sixth Olympic medal, making her the most decorated Summer Olympian in Canadian history, and tying her with Clara Hughes and Cindy Klassen for the most Olympic medals won by a Canadian.