The 1959 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 4 September until 13 September. It was the 79th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.
Neale Fraser (AUS) defeated Alex Olmedo (PER) 6–3, 5–7, 6–2, 6–4
Maria Bueno (BRA) defeated Christine Truman Janes (UK) 6–1, 6–4
Neale Fraser (AUS) / Roy Emerson (AUS) defeated Alex Olmedo (PER) / Earl Buchholz (USA) 3–6, 6–3, 5–7, 6–4, 7–5 
Jeanne Arth (USA) / Darlene Hard (USA) defeated Althea Gibson (USA) / Sally Moore (USA) 6–2, 6–3 
Margaret Osborne (USA) / Neale Fraser (AUS) defeated Janet Hopps (USA) / Bob Mark (AUS) 7–5, 13–15, 6–2 
- ^ Collins, Bud (2010). The Bud Collins History of Tennis (2nd ed. ed.). [New York]: New Chapter Press. p. 477. ISBN 978-0942257700.
- ^ Collins, p. 480
- ^ Collins, p. 482