The 1989 Puerto Rico Open was a women's tennis tournament played on outdoor hard courts at the Hyatt Regency Cerromar Hotel in Dorado, Puerto Rico that was part of the Category 2 tier of the 1989 WTA Tour.

It was the fourth edition of the tournament and was held from October 23 through October 29, 1989.

Fourth-seeded Laura Gildemeister won the singles title and earned $17,000 first-prize money.

[1][2] Laura Gildemeister defeated Gigi Fernández 6–1, 6–2 Cammy MacGregor / Ronni Reis vs. Gigi Fernández / Robin White final rained out