The 1955 U.S. National Championships was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club, Forest Hills in New York City, New York. The tournament ran from 2 September until 11 September. It was the 75th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year. US Open 1955: September 2–11, 1955 at Longwood Cricket Club West Side Tennis Club. Men's singles: Tony Trabert — 5th major title. Women's singles: Doris Hart — 6th major title. Wiki link