| Champ: |  Wang Xiyu |
| Runner: |  Clara Burel |
| Score: | 7–6(7–4), 6–2 |
See main article: 2018 US Open (tennis).
Amanda Anisimova was the defending champion, but was chosen to compete in the women's singles instead as a wild card losing to Taylor Townsend in the first round.
Wang Xiyu won the title, defeating Clara Burel in the final, 7–6(7–4), 6–2.