1911 U.S. National Championships (tennis)
| 1911 U.S. National Championships | |
|---|---|
| Date | 21 August – 3 September (M) 12 June – 17 June (W) |
| Edition | 31st |
| Category | Grand Slam |
| Surface | Grass (outdoor) |
| 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 | |
| Raymond Little / Gustav Touchard[2] | |
| Women's doubles | |
| Hazel Hotchkiss / Eleonora Sears[3] | |
| Mixed doubles | |
| Hazel Hotchkiss / Wallace F. Johnson[4] | |
The 1911 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 21 August until 3 September while the women's singles and doubles championship took place from 12 June to 17 June at the Philadelphia Cricket Club in Chestnut Hill. It was the 31st staging of the U.S. National Championships, and the second Grand Slam tennis event of the year. William Larned won the men's singles championship for a record seventh and final time.
Finals
Men's singles
William Larned (USA) defeated Maurice McLoughlin (USA) 6–4, 6–4, 6–2
Women's singles
Hazel Hotchkiss (USA) defeated Florence Sutton (USA) 8–10, 6–1, 9–7
Men's doubles
Raymond Little (USA) / Gustav Touchard (USA) defeated Fred Alexander (USA) / Harold Hackett (USA) 7–5, 13–15, 6–2, 6–4
Women's doubles
Hazel Hotchkiss (USA) / Eleonora Sears (USA) defeated Dorothy Green (USA) / Florence Sutton (USA) 6–4, 4–6, 6–2
Mixed doubles
Hazel Hotchkiss (USA) / Wallace F. Johnson (USA) defeated 
Edna Wildey (USA) / Herbert M. Tilden (USA) 6–4, 6–4