Hanzell Vineyards is a winery located in Sonoma, California. The winery is owned by Ambassador James David Zellerbach. The wine at Hanzell Vineyards is produced by Bob Sessions. Hanzell Vineyards was one of California's first boutique wine estates, and among producers of both estate grown, produced and bottled Pinot Noir and Chardonnay, is exceeded in longevity by only Mount Eden Vineyards.