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
JPN	Nao Hibino	119	1
USA	Grace Min	172	2
USA	Ashley Kratzer	230	3
USA	Danielle Lao	239	4
JPN	Misaki Doi	241	5
USA	Asia Muhammad	248	6
USA	Jacqueline Cako	273	7
USA	Emina Bektas	276	8

• ¹ Rankings as of 2 July 2018.

The following players received a wildcard into the singles main draw:

• Ashley Lahey
• Lena Lutzeier
• Anastasia Nefedova
• Amanda Rodgers

The following players received entry from the qualifying draw:

• Andreea Ghițescu
• Catherine Harrison
• Dominique Schaefer
• Denise Starr

• Nao Hibino def. Jessica Pegula, 6–0, 6–2

• Misaki Doi / Jessica Pegula def. Taylor Johnson / Ashley Lahey, 7–6^(7–4), 6–3

• 2018 Tennis Championships of Honolulu at ITFtennis.com
• Official website