| 1957 U.S. National Championships | |
|---|---|
| Date | 30 August – 8 September |
| Edition | 77th |
| Category | Grand Slam (ILTF) |
| Surface | Grass |
| Location | Chestnut Hill, Massachusetts Forest Hills, Queens, New York City United States |
| Venue | Longwood Cricket Club West Side Tennis Club |
| Champions | |
| Men's singles | |
.svg.png.webp){kind=small} Malcolm Anderson[1] | |
| Women's singles | |
 Althea Gibson | |
| Men's doubles | |
| Ashley Cooper / Neale Fraser | |
| Women's doubles | |
| Louise Brough / Margaret Osborne | |
| Mixed doubles | |
Althea Gibson /  Kurt Nielsen | |
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 City, United States. 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.
Finals
Men's singles
Malcolm Anderson (AUS) defeated Ashley Cooper (AUS) 10–8, 7–5, 6–4
Women's singles
Althea Gibson (USA) defeated Louise Brough (USA) 6–3, 6–2
Men's doubles
Ashley Cooper (AUS) / Neale Fraser (AUS) defeated Gardnar Mulloy (USA) / Budge Patty (USA) 4–6, 6–3, 9–7, 6–3 [2]
Women's doubles
Louise Brough (USA) / Margaret Osborne duPont (USA) defeated Althea Gibson (USA) / Darlene Hard (USA) 6–2, 7–5 [3]
Mixed doubles
Althea Gibson (USA) / Kurt Nielsen (DEN) defeated Darlene Hard (USA) / Bob Howe (AUS) 6–3, 9–7 [4]