| San Diego Open | |
|---|---|
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| Tournament information | |
| Founded | 1971 |
| Location | San Diego, California United States |
| Venue | La Costa Resort and Spa (2004–2015) Barnes Tennis Center (2021–present) |
| Category | WTA Tier I (2004–2007) WTA Premier (2010–2013) WTA 125K series (2015) ATP 250 (2021–2022) WTA 500 (2022–) |
| Surface | Hardcourt / Outdoor |
| Draw | 28S / 24SQ / 16D |
| Prize money | $922,573 (women) |
| Current champions (2024) | |
| Women's singles |  Katie Boulter |
| Women's doubles |  Nicole Melichar-Martinez Ellen Perez |
The San Diego Open is an annual professional tennis tournament on the WTA Tour, held in San Diego, California. The tournament was founded in 1971 as a women's event called the Southern California Open.
Today it is held at the Barnes Tennis Center. The tournament is part of the WTA 500, a category governed by the Women's Tennis Association (WTA).