The 1957 U.S. National Championships (now known as the US Open) was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York, USA. The tournament ran from 30 August until 8 September. It was the 77th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.
Malcolm Anderson (AUS) defeated Ashley Cooper (AUS) 10–8, 7–5, 6–4
Althea Gibson (USA) defeated Louise Brough Clapp (USA) 6–3, 6–2
Ashley Cooper (AUS) / Neale Fraser (AUS) defeated Gardnar Mulloy (USA) / Budge Patty (USA) 4–6, 6–3, 9–7, 6–3 
Louise Brough (USA) / Margaret Osborne (USA) defeated Althea Gibson (USA) / Darlene Hard (USA) 6–2, 7–5 
Althea Gibson (USA) / Kurt Nielsen (DEN) defeated Darlene Hard (USA) / Bob Howe (AUS) 6–3, 9–7 
- ^ Collins, Bud (2010). The Bud Collins History of Tennis (2nd ed. ed.). [New York]: New Chapter Press. p. 477. ISBN 978-0942257700.
- ^ Collins, p. 480
- ^ Collins, p. 482