1988 Northern California Open

The 1988 Northern California Open was a tennis tournament played on outdoor hard courts in Aptos, California, in the United States and was part of Tier V of the 1988 WTA Tour. The tournament ran from July 25 through July 31, 1988.

Women's singles
🇬🇧 Sara Gomer defeated 🇺🇸 Robin White 6–4, 7–5
 * It was Gomer's only title of the year and the 1st of her career.

Women's doubles
Lise Gregory / 🇺🇸 Ronni Reis defeated 🇺🇸 Patty Fendick / 🇨🇦 Jill Hetherington 6–3, 6–4
 * It was Gregory's only title of the year and the 2nd of her career. It was Reis' only title of the year and the 3rd of her career.