1945 U.S. National Championships (tennis)
| 1945 U.S. National Championships | |
|---|---|
| Date | 28 August – 3 September |
| Edition | 65th |
| Category | Grand Slam (ILTF) |
| Surface | Grass |
| Location | Forest Hills, Queens New York, United States |
| Venue | West Side Tennis Club |
| Champions | |
| Men's singles | |
 Frank Parker | |
| Women's singles | |
| Sarah Palfrey Cooke | |
| Men's doubles | |
| Gardnar Mulloy / Bill Talbert | |
| Women's doubles | |
| Louise Brough / Margaret Osborne | |
| Mixed doubles | |
| Margaret Osborne / Bill Talbert | |
The 1945 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, United States. The tournament ran from 28 August until 3 September. It was the 65th staging of the U.S. National Championships, and due to World War II it was the only Grand Slam tennis event of the year.[1]
Finals
Men's Singles
Frank Parker defeated William Talbert 14–12, 6–1, 6—2
Women's Singles
Sarah Palfrey Cooke defeated Pauline Betz 3–6, 8–6, 6–4
Men's Doubles
Gardnar Mulloy / Bill Talbert defeated 
Bob Falkenburg / Jack Tuero 12–10, 8–10, 12–10, 6–2 [2]
Women's Doubles
Louise Brough / Margaret Osborne defeated Pauline Betz / Doris Hart 6–3, 6–3 [3]
Mixed Doubles
Margaret Osborne / Bill Talbert defeated Doris Hart / Bob Falkenberg 6–4, 6–4 [4]