Sandra Anne Morgan (born 6 June 1942) is an Australian former freestyle swimmer, who won gold in the 4×100-metre freestyle relay at the 1956 Summer Olympics in Melbourne. At the age of 14 years and 6 months, she became the youngest Australian to win an Olympic gold medal, a record that still stands. Morgan began serious training in early 1956 and won Olympic selection for the relay team as well as the 400-metre freestyle.