The 1963 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 28 August until 8 September. It was the 83rd staging of the U.S. National Championships, and the fourth Grand Slam tennis event of 1963.
See main article: 1963 U.S. National Championships – Men's singles. 
Rafael Osuna defeated 
Frank Froehling 7–5, 6–4, 6–2
See main article: 1963 U.S. National Championships – Women's singles. 
Maria Bueno defeated 
Margaret Smith 7–5, 6–4
Chuck McKinley / Dennis Ralston defeated Rafael Osuna / Antonio Palafox 9–7, 4–6, 5–7, 6–3, 11–9 [1]
Robyn Ebbern / Margaret Smith defeated Maria Bueno / Darlene Hard, 4–6, 10–8, 6–3 [2]
Margaret Smith / Ken Fletcher defeated Judy Tegart / Ed Rubinoff 3–6, 8–6, 6–2 [3]