The 1974 US Open was a tennis tournament that took place on the outdoor grass courts at the West Side Tennis Club in Forest Hills, Queens, in New York City in the United States.

The tournament ran from 26 August until 8 September.

It was the 94th staging of the US Open, and the fourth Grand Slam tennis event of 1974.

The girls’ championship was introduced in 1974, and it was the last year the tournament was played on grass courts.

[1] Jimmy Connors defeated Ken Rosewall, 6–1, 6–0, 6–1 Billie Jean King defeated Evonne Goolagong, 3–6, 6–3, 7–5 Bob Lutz / Stan Smith defeated Patricio Cornejo / Jaime Fillol, 6–3, 6–3 Rosemary Casals / Billie Jean King defeated Françoise Dürr / Betty Stöve, 7–6, 6–7, 6–4 Pam Teeguarden / Geoff Masters defeated Chris Evert / Jimmy Connors, 6–1, 7–6 Billy Martin defeated Ferdi Taygan, 6–4, 6–2 Ilana Kloss defeated Mima Jaušovec, 6–4, 6–3