| 1931 U.S. National Championships | ||||
|---|---|---|---|---|
| Date | September 3–10 (M) August 15–20 (W) | |||
| Edition | 51st | |||
| Category | Grand Slam (ITF) | |||
| Surface | Grass / Outdoor | |||
| Location | Forest Hills, Queens New York City, New York | |||
| Venue | West Side Tennis Club | |||
| Champions | ||||
| Men's singles | ||||
 Ellsworth Vines | ||||
| Women's singles | ||||
| Helen Wills Moody | ||||
| Men's doubles | ||||
| Wilmer Allison /John Van Ryn | ||||
| Women's doubles | ||||
 Betty Nuthall /Eileen Bennett Whittingstall | ||||
| Mixed doubles | ||||
| Betty Nuthall /George Lott | ||||
| ||||
The1931 U.S. National Championships (now known as theUS Open) was atennis tournament that took place on the outdoorgrass courts at theWest Side Tennis Club, Forest Hills inNew York City, New York. The tournament ran from September 3 until September 10. It was the 51st staging of theU.S. National Championships and the fourthGrand Slam tennis event of the year.[1]
Ellsworth Vines defeatedGeorge Lott 7–9, 6–3, 9–7, 7–5
Helen Wills Moody defeatedEileen Bennett Whittingstall 6–4, 6–1
Wilmer Allison /John Van Ryn defeated
Gregory Mangin /Berkeley Bell 6–4, 8–6, 6–3[2]
Betty Nuthall /Eileen Bennett Whittingstall defeatedHelen Jacobs /Dorothy Round 6–2, 6–4[3]
Betty Nuthall /George Lott defeatedAnna McCune Harper /Wilmer Allison 6–3, 6–3[4]
| Preceded by | Grand Slams | Succeeded by |