1939 U.S. National Championships – Women's singles
| Women's singles | |
|---|---|
| 1939 U.S. National Championships | |
| Champion | Alice Marble |
| Runner-up | Helen Jacobs |
| Score | 6–0, 8–10, 6–4 |
| Draw | 64 |
| Seeds | 8 |
First-seeded Alice Marble defeated second-seeded Helen Jacobs 6–0, 8–10, 6–4 in the final to win the women's singles tennis title at the 1939 U.S. National Championships. The tournament was played on outdoor grass courts and held from September 7, through September 17, 1939 at the West Side Tennis Club in Forest Hills, Queens, New York.
The draw consisted of 64 players of which eight were seeded.