| Date: | 9–15 July |
| Edition: | 1st |
| Category: | ITF Women's Circuit |
| Location: | Honolulu, United States |
| Prize Money: | $60,000 |
| Champs: |  Nao Hibino |
| Champd: | Misaki Doi /  Jessica Pegula |
The 2018 Tennis Championships of Honolulu was a professional tennis tournament played on outdoor hard courts. It was the first edition of the tournament and was part of the 2018 ITF Women's Circuit. It took place in Honolulu, United States, on 9–15 July 2018.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Japan | Nao Hibino | 119 | 1 | |
| United States | Grace Min | 172 | 2 | |
| United States | Ashley Kratzer | 230 | 3 | |
| United States | Danielle Lao | 239 | 4 | |
| Japan | Misaki Doi | 241 | 5 | |
| United States | Asia Muhammad | 248 | 6 | |
| United States | Jacqueline Cako | 273 | 7 | |
| United States | Emina Bektas | 276 | 8 |
The following players received a wildcard into the singles main draw:
Ashley Lahey Anastasia Nefedova Amanda RodgersThe following players received entry from the qualifying draw:
Andreea Ghițescu Catherine Harrison
Dominique Schaefer Denise StarrSee main article: 2018 Tennis Championships of Honolulu – Singles.
Nao Hibino def. Jessica Pegula, 6–0, 6–2See main article: 2018 Tennis Championships of Honolulu – Doubles.
Misaki Doi / Jessica Pegula def. Taylor Johnson / Ashley Lahey, 7–6(7–4), 6–3