The 1946 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 August 31 until September 8. It was the 66th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.[1]
See main article: 1946 U.S. National Championships – Men's singles. 
Jack Kramer defeated Tom Brown Jr. 9–7, 6–3, 6–0
See main article: 1946 U.S. National Championships – Women's singles. Pauline Betz defeated Doris Hart 11–9, 6–3
Gardnar Mulloy / Bill Talbert defeated Frank Guernsey / Don McNeill 3–6, 6–4, 2–6, 6–3, 20–18 [2]
Louise Brough / Margaret Osborne defeated Patricia Todd / Mary Arnold Prentiss 6–1, 6–3 [3]
Margaret Osborne / Bill Talbert defeated Louise Brough / Robert Kimbrell 6–3, 6–4 [4]