The mixed doubles was a tennis event held as part of the Tennis at the 1920 Summer Olympics programme. It was the third appearance of the event. A total of 32 players (16 pairs) from 7 nations competed in the event, which was held from 17 to 24 August 1920 at the Beerschot Tennis Club. French pair Suzanne Lenglen and Max Decugis took gold, with British players Kathleen McKane Godfree and Max Woosnam earning silver and Czechoslovakia's Milada Skrbková and Ladislav Žemla winning bronze. It was the first victory for France in the event; Czechoslovakia earned its first mixed doubles medal in its event debut.