Oak Knoll Winery is a privately held winery located in the Tualatin Valley near Hillsboro, Oregon, United States. Established in 1970, it is the largest winery in Washington County and produces Pinot noir, Pinot gris, and Chardonnay. Its prolific variety of wines owes to its rather unusual lack of its own vineyard. It obtains grapes from area producers instead.
Oak Knoll uses grapes from within the Willamette Valley AVA to produce its wines. The winery is a family run Enterprise with Greg Lint serving as president. It has annual revenues of $7.5 million selling varieties including Chardonnay, Pinot noir, Niagara, and Pinot gris among others, under its own label and the Twilight Blush, Eruption, and Frambrosia labels. They are the official wine sponsor of the Portland Rose Festival.