The 1951 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 25 August until 5 September. It was the 71st staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.
Frank Sedgman defeated Vic Seixas 6–4, 6–1, 6–1
Maureen Connolly Brinker defeated Shirley Fry Irvin 6–3, 1–6, 6–4
Ken McGregor / Frank Sedgman defeated Don Candy / Mervyn Rose 10–8, 6–4, 4–6, 7–5 
Shirley Fry / Doris Hart defeated Nancy Chaffee / Patricia Todd 6–4, 6–2 
Doris Hart / Frank Sedgman defeated Shirley Fry / Mervyn Rose 6–3, 6–2 
- ^ Collins, Bud (2010). The Bud Collins History of Tennis (2nd ed.). [New York]: New Chapter Press. pp. 95–97. ISBN 978-0942257700.
- ^ Collins, p. 477
- ^ Collins, p. 480
- ^ Collins, p. 482