1991 Mazda Classic
Date	July 29 – August 5
Edition	13th
Category	Tier III
Draw	28S / 16D
Prize money	$225,000
Surface	Hard / outdoor
Location	San Diego, California, U.S.
Venue	La Costa Resort and Spa
Champions
Singles
Jennifer Capriati
Doubles
Jill Hetherington / Kathy Rinaldi
← 1990 · Southern California Open · 1992 →

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.

It was the tournament's first year in La Costa after moving from the San Diego Tennis & Racquet Club. It was also Mazda's first year as sponsor after replacing Great American Bank, a San Diego–based institution that was in financial decline.^[1]

Jennifer Capriati defeated Monica Seles, 4–6, 6–1, 7–6^(7–2)

Jill Hetherington / Kathy Rinaldi defeated Gigi Fernández / Nathalie Tauziat, 6–4, 3–6, 6–2

• ITF tournament edition details
• WTA tournament draws