The 1975 US Open was a tennis tournament that took place on the outdoor clay courts at the West Side Tennis Club in Forest Hills, Queens, in New York City, United States. The tournament ran from 27 August until 7 September. It was the 95th staging of the US Open, and the fourth Grand Slam tennis event of 1975. During the final three years at the Forest Hills location, 1975-1977, the US Open was played on a green-colored Har-Tru clay surface, a surface slightly harder and faster than red clay. The switch came after player complaints about the poor state and uneven ball bounce on the grass courts in Forest Hills.[1] The tie-break scoring system changed in this championship. Previously a sudden death point was played at 4–4 with the winner the first to 5 points. It changed to the 13 point tie-break first to 7 points or the first player to win by two clear points if the scores reached 6–6.
See main article: 1975 US Open – Men's singles. 
Manuel Orantes[2] defeated 
Jimmy Connors, 6–4, 6–3, 6–3
See main article: 1975 US Open – Women's singles. Chris Evert defeated 
Evonne Goolagong, 5–7, 6–4, 6–2
See main article: 1975 US Open – Men's doubles. Jimmy Connors / Ilie Năstase defeated Tom Okker / Marty Riessen, 6–4, 7–6
See main article: 1975 US Open – Women's doubles. Margaret Court / 
Virginia Wade defeated Rosemary Casals / Billie Jean King, 7–5, 2–6, 7–6
See main article: 1975 US Open – Mixed doubles. Rosemary Casals / Dick Stockton defeated Billie Jean King / Fred Stolle, 6-3, 6-7, 6-3
Howard Schoenfield defeated 
Chris Lewis, 6–4, 6–3
Natasha Chmyreva defeated 
Greer Stevens, 6–7, 6–2, 6–2