List of champions of the 1908 U.S. National Championships tennis tournament (now known as the US Open). The men's tournament was held from August 18 to August 29 on the outdoor grass courts at the Newport Casino in Newport, Rhode Island. The women's tournament was held from June 22 to June 27 on the outdoor grass courts at the Philadelphia Cricket Club in Philadelphia, Pennsylvania. It was the 28th U.S. National Championships and the second Grand Slam tournament of the three played that year.
| 1908 U.S. National Championships | |
|---|---|
| Date | August 18–29 (M) June 22–27 (W) |
| Edition | 28th |
| Category | Grand Slam |
| Surface | Grass |
| Location | Newport, R.I., United States (M) Philadelphia, PA, United States (W) |
| Champions | |
| Men's singles | |
 William Larned[1] | |
| Women's singles | |
| Maud Barger-Wallach[1] | |
| Men's doubles | |
| Fred Alexander / Harold Hackett[1] | |
| Women's doubles | |
| Evelyn Sears / Margaret Curtis[1] | |
| Mixed doubles | |
| Edith Rotch / Nathaniel Niles[1] | |
Finals edit
Men's singles edit
William Larned (USA) defeated Beals Wright (USA) 6–1, 6–2, 8–6
Women's singles edit
Maud Barger-Wallach (USA) defeated Evelyn Sears (USA) 6–3, 1–6, 6–3
Men's doubles edit
Fred Alexander (USA) / Harold Hackett (USA) defeated Raymond Little (USA) / Beals Wright (USA) 6–1, 7–5, 6–2
Women's doubles edit
Evelyn Sears (USA) / Margaret Curtis (USA) defeated Carrie Neely (USA) / Miriam Steever (USA) 6–3, 5–7, 9–7
Mixed doubles edit
Edith Rotch (USA) / Nathaniel Niles (USA) defeated Louise Hammond Raymond (USA) / Raymond Little (USA) 6–4, 4–6, 6–4