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, USA. 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.
Rafael Osuna defeated Frank Froehling 7–5, 6–4, 6–2
Maria Bueno defeated Margaret Court 7–5, 6–4
Chuck McKinley / Dennis Ralston defeated Rafael Osuna / Antonio Palafox 9–7, 4–6, 5–7, 6–3, 11–9 
Robyn Ebbern / Margaret Smith Court defeated Darlene Hard / Maria Bueno, 4–6, 10–8, 6–3 
Margaret Smith Court / Ken Fletcher defeated Judy Tegart / Ed Rubinoff 3–6, 8–6, 6–2 
- ^ Collins, Bud (2010). The Bud Collins History of Tennis (2nd ed. ed.). [New York]: New Chapter Press. p. 478. ISBN 978-0942257700.
- ^ Collins, p. 480
- ^ Collins, p. 482