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 City, United States.

The tournament ran from September 6 until September 14.

It was the 67th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.

[1] Jack Kramer defeated Frank Parker 4–6, 2–6, 6–1, 6–0, 6–3 Louise Brough defeated Margaret Osborne 8–6, 4–6, 6–1 Jack Kramer / Ted Schroeder defeated Bill Talbert / Bill Sidwell 6–4, 7–5, 6–3 [2] Louise Brough / Margaret Osborne defeated Patricia Todd / Doris Hart 5–7, 6–3, 7–5 [3] Louise Brough / John Bromwich defeated Gussie Moran / Pancho Segura 6–3, 6–1 [4]