The 1950 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 25 August until 5 September. It was the 70th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.[1] A highlight of that year's tournament was Margaret Osborne du Pont's triple crown.
See main article: 1950 U.S. National Championships – Men's singles. 
Art Larsen defeated Herb Flam 6–3, 4–6, 5–7, 6–4, 6–3
See main article: 1950 U.S. National Championships – Women's singles. Margaret Osborne duPont defeated Doris Hart 6–3, 6–3
John Bromwich / Frank Sedgman defeated Bill Talbert / Gardnar Mulloy 7–5, 8–6, 3–6, 6–1 [2]
Louise Brough / Margaret Osborne duPont defeated Shirley Fry / Doris Hart 6–2, 6–3 [3]
Margaret Osborne duPont / Ken McGregor defeated Doris Hart / Frank Sedgman 6–4, 3–6, 6–3 [4]