Flynn Southam (born 5 June 2005) is an Australian swimmer. He won three gold medals at the 2022 Commonwealth Games, one each in the 4×100 metre freestyle relay, the 4×200 metre freestyle relay, and the 4×100 metre mixed freestyle relay. At the 2022 Junior Pan Pacific Swimming Championships, he won gold medals in the 50 metre freestyle, 100 metre freestyle, 200 metre freestyle, and the 4×200 metre freestyle relay, and silver medals in the 4×100 metre freestyle relay and the 4×100 metre medley relay.