The 1989 United Jersey Bank Classic was a women's tennis tournament played on outdoor hard courts in Mahwah, New Jersey in the United States that was part of the Category 3 tier of the 1989 WTA Tour.

It was the 12th and last edition of the tournament and was held from August 14 through August 20, 1989.

First-seeded Steffi Graf won her second consecutive singles title and third in total and earned $40,000 first-prize money.

[1] Steffi Graf defeated Andrea Temesvári 7–5, 6–2 Steffi Graf / Pam Shriver defeated Louise Allen / Laura Gildemeister 6–2, 6–4