The 1961 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 1 until September 10, 1961. It was the 81st staging of the U.S. National Championships, and the fourth Grand Slam tennis event of 1961.
See main article: 1961 U.S. National Championships – Men's singles. 
Roy Emerson defeated Rod Laver 7–5, 6–3, 6–2
See main article: 1961 U.S. National Championships – Women's singles. 
Darlene Hard defeated Ann Haydon 6–3, 6–4
Chuck McKinley / Dennis Ralston defeated 
Rafael Osuna / Antonio Palafox 6–3, 6–4, 2–6, 13–11 [1]
Darlene Hard / Lesley Turner defeated Edda Buding / Yola Ramírez 6–4, 5–7, 6–0 [2]
Margaret Smith / Bob Mark defeated Darlene Hard / Dennis Ralston default [3]