The primary agricultural product of California is Grapes.

California is renowned as the leading grape-producing state in the United States, significantly contributing to both table grape and wine production. The state's diverse climate and rich soils allow for the cultivation of various grape varieties, making it the heart of the U.S. wine industry. Regions such as Napa Valley and Sonoma County are famous for their vineyards and wineries, attracting tourists and wine enthusiasts from around the world. Beyond wine, California's agriculture also includes a wide range of other crops, but grapes remain the most prominent due to their economic impact and cultural significance.