1991 Mazda Classic
| 1991 Mazda Classic | |
|---|---|
| Date | July 29 – August 5 |
| Edition | 13th |
| Category | Tier III |
| Draw | 28S / 16D |
| Surface | Hard / outdoor |
| Location | San Diego, California, U.S. |
| Venue | La Costa Resort and Spa |
| Champions | |
| Singles | |
 Jennifer Capriati | |
| Doubles | |
 Jill Hetherington / Kathy Rinaldi | |
The 1991 Mazda 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 Tier III of the 1991 WTA Tour. It was the 13th edition of the tournament and was held from July 29 through August 5, 1991. Fourth-seeded Jennifer Capriati won the singles title and earned $45,000 first-prize money.
Finals
Singles
Jennifer Capriati defeated 
Monica Seles, 4–6, 6–1, 7–6(7–2)
Doubles
Jill Hetherington / Kathy Rinaldi defeated Gigi Fernández / 
Nathalie Tauziat, 6–4, 3–6, 6–2