1931 U.S. National Championships – Women's singles
| Women's singles | |
|---|---|
| 1931 U.S. National Championships | |
| Champion | Helen Wills Moody |
| Runner-up | Eileen Bennett Whittingstall |
| Score | 6–4, 6–1 |
First-seeded Helen Wills Moody defeated Eileen Bennett Whittingstall 6–4, 6–1 in the final to win the women's singles tennis title at the 1931 U.S. National Championships. Wills Moody won the tournament without losing a set.