1949 U.S. National Championships (tennis)
| 1949 U.S. National Championships | |
|---|---|
| Date | August 26 – September 5 |
| Edition | 69th |
| Category | Grand Slam (ILTF) |
| Surface | Grass |
| Location | Chestnut Hill, Massachusetts Forest Hills, Queens, New York City United States |
| Venue | Longwood Cricket Club West Side Tennis Club |
| Champions | |
| Men's singles | |
| Pancho Gonzales | |
| Women's singles | |
| Margaret Osborne duPont | |
| Men's doubles | |
| John Bromwich / Bill Sidwell | |
| Women's doubles | |
| Louise Brough / Margaret Osborne duPont | |
| Mixed doubles | |
| Louise Brough / Eric Sturgess | |
The 1949 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, New York. The tournament ran from August 26 until September 5. It was the 69th staging of the U.S. National Championships, and the fourth Grand Slam tennis event of the year.
Pancho Gonzales won his second and final Grand Slam title before turning professional.