| 1989 Great American Bank Classic | |
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| Date | July 31 – August 6 |
| Edition | 11th |
| Category | Category 3 |
| Draw | 32S / 16D |
| Prize money | $200,000 |
| Surface | Hard / outdoor |
| Location | San Diego, California, U.S. |
| Venue | La Costa Resort and Spa |
| Champions | |
| Singles | |
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| Doubles | |
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The 1989 Great American Bank Classic was a women's tennis tournament played on outdoor hard courts at the La Costa Resort and Spa in San Diego, California in the United States that was part of the Category 3 tier of the 1989 WTA Tour. The tournament was held from July 31 through August 6, 1989. First-seeded Steffi Graf won the singles title.
Steffi Graf defeated
Zina Garrison 6–4, 7–5
Elise Burgin /
Rosalyn Fairbank defeated
Gretchen Magers /
Robin White 4–6, 6–3, 6–3