Peter Michael Winery is a wine producer located in northern California, on the border of Napa and Sonoma counties in the Knights Valley AVA. The winery produces a number of single-vineyard wines including Cabernet Sauvignon-dominant blends, Chardonnay, Pinot Noir, and Sauvignon Blanc – Semillon blends.

The winery was established by Peter Michael and his wife Margaret in 1982. Michael founded the technology company Quantel and arrived in California in the early days of the Silicon Valley tech boom. The winery released its first vintage in 1987 and has since enjoyed a rarely paralleled amount of critical acclaim. Three of Peter Michael’s wines have ranked in the top 10 of Wine Spectator’s Top 100, and since the 1995 vintage, 14 wines have been rated 98 points or higher by critic Robert Parker.