The 1947 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 6 September until 14 September. It was the 67th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.
Jack Kramer defeated Frank Parker 4–6, 2–6, 6–1, 6–0, 6–3
Louise Brough defeated Margaret Osborne duPont 8–6, 4–6, 6–1
Jack Kramer / Ted Schroeder defeated Bill Talbert / Bill Sidwell 6–4, 7–5, 6–3 
Louise Brough / Margaret Osborne defeated Patricia Todd / Doris Hart 5–7, 6–3, 7–5 
Louise Brough / John Bromwich defeated Gussie Moran / Pancho Segura 6–3, 6–1 
- ^ Collins, Bud (2010). The Bud Collins History of Tennis (2nd ed.). [New York]: New Chapter Press. pp. 83–85. ISBN 978-0942257700.
- ^ Collins, p. 477
- ^ Collins, p. 480
- ^ Collins, p. 482