| 1929 U.S. National Championships | |
|---|---|
| Date | September 7 – 14 (M) August 19 – 24 (W) |
| Edition | 49th |
| Category | Grand Slam (ITF) |
| Surface | Grass |
| Location | Forest Hills, Queens New York City, United States |
| Venue | West Side Tennis Club |
| Champions | |
| Men's singles | |
 Bill Tilden[1] | |
| Women's singles | |
| Helen Wills[1] | |
| Men's doubles | |
| George Lott / John Doeg[2] | |
| Women's doubles | |
 Phoebe Holcroft Watson / Peggy Michell [3] | |
| Mixed doubles | |
| Betty Nuthall / George Lott[4] | |
The 1929 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 men's tournament ran from September 7 until September 14, while the women's event took place from August 19 to August 24. It was the 49th staging of the U.S. National Championships and the fourth Grand Slam tennis event of the year. In the men's singles competition Bill Tilden won his record seventh and final singles title.