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.
See main article: 1929 U.S. National Championships – Men's singles. 
Bill Tilden defeated Francis Hunter 3–6, 6–3, 4–6, 6–2, 6–4
See main article: 1929 U.S. National Championships – Women's singles. Helen Wills defeated 
Phoebe Holcroft Watson 6–4, 6–2
George Lott / John Doeg defeated Berkeley Bell / Lewis White 10–8, 16–14, 6–1
Phoebe Holcroft Watson / Peggy Michell defeated Phyllis Covell / Dorothy Shepherd-Barron 2–6, 6–3, 6–4
Betty Nuthall / George Lott defeated Phyllis Covell / Bunny Austin 6–3, 6–3