The 1910 U.S. National Championships (now known as the US Open) took place on the outdoor grass courts at the Newport Casino in Newport, United States. The men's singles tournament ran from August 15 until August 25 while the women's singles and doubles championship took place from June 20 to June 26 at the Philadelphia Cricket Club in Chestnut Hill. It was the 30th staging of the U.S. National Championships, and the third Grand Slam tennis event of the year.
| 1910 U.S. National Championships | |
|---|---|
| Date | August 15–25 (M) June 20–26 (W) |
| Edition | 30th |
| Category | Grand Slam |
| Surface | Grass |
| Location | Newport, R.I., United States (M) Philadelphia, PA, United States (W) |
| Venue | Newport Casino (M) Philadelphia Cricket Club (W) |
| Champions | |
| Men's singles | |
 William Larned[1] | |
| Women's singles | |
| Hazel Hotchkiss[1] | |
| Men's doubles | |
| Fred Alexander / Harold Hackett[1] | |
| Women's doubles | |
| Hazel Hotchkiss / Edith Rotch[1] | |
| Mixed doubles | |
| Hazel Hotchkiss / Joseph Carpenter, Jr.[1] | |
Finals edit
Men's singles edit
William Larned (USA) defeated Tom Bundy (USA) 6–1, 5–7, 6–0, 6–8, 6–1
Women's singles edit
Hazel Hotchkiss (USA) defeated Louise Hammond (USA) 6–4, 6–2
Men's doubles edit
Fred Alexander (USA) / Harold Hackett (USA) defeated Tom Bundy (USA) / Trowridge Hendrick (USA) 6–1, 8–6, 6–3
Women's doubles edit
Hazel Hotchkiss (USA) / Edith Rotch (USA) defeated Adelaide Browning (USA) / Edna Wildey (USA) 6–4, 6–4
Mixed doubles edit
Hazel Hotchkiss (USA) / Joseph Carpenter, Jr. (USA) defeated 
Edna Wildey (USA) / Herbert M. Tilden (USA) 6–2, 6–2