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.

Finals

Men's singles

🇺🇸 Jack Kramer defeated 🇺🇸 Frank Parker 4–6, 2–6, 6–1, 6–0, 6–3

Women's singles

🇺🇸 Louise Brough defeated 🇺🇸 Margaret Osborne 8–6, 4–6, 6–1

Men's doubles

🇺🇸 Jack Kramer / 🇺🇸 Ted Schroeder defeated 🇺🇸 Bill Talbert / 🇦🇺 Bill Sidwell 6–4, 7–5, 6–3

Women's doubles

🇺🇸 Louise Brough / 🇺🇸 Margaret Osborne defeated 🇺🇸 Patricia Todd / 🇺🇸 Doris Hart 5–7, 6–3, 7–5

Mixed doubles

🇺🇸 Louise Brough / 🇦🇺 John Bromwich defeated 🇺🇸 Gussie Moran / 🇪🇨 Pancho Segura 6–3, 6–1