Maxime Grousset is a French swimmer from New Caledonia. He is a world record holder in the short course 4×50 metre mixed freestyle relay and european record holder in the long course 100 butterfly with a time of 49.62, second best performer and third best performances of all time. In butterfly, he has won three gold medals at the World Aquatics Championships, in 50 m in 2025, and in 100 m in 2023 and 2025.