Mendocino is an American Viticultural Area (AVA) located in Mendocino County, California within the vast 3,251,042 acres (5,080 sq mi) multi-county North Coast appellation. Mendocino AVA was established on June 15, 1984 by the Bureau of Alcohol, Tobacco and Firearms (ATF), Treasury after reviewing a petition submitted by Mr. James A. Beckman, Vice-President of Guild Wineries and Distilleries, on behalf of 113 local viticulture industry members within the County, proposing a viticultural area named "Mendocino." The 283,300 acres (443 sq mi) viticultural area encompasses eight valleys including Anderson Valley, Potter Valley, Redwood Valley, Capella Valley, Ukiah Valley, Knights (McNab) Valley, Sanel Valley, and McDowell Valley where approximately 35,000 acres (55 sq mi) or 13 percent of the area is suitable for grape production. As of 2024, eight smaller sub-AVAs are nested within the Mendocino appellation that largely encompasses Mendocino County. The “Mendocino” name is synonymous with excellent wines, i.e., Carignan, Charbono, Grenache, Petite Sirah, Syrah and Zinfandel, that are sourced from the Mediterranean climate grapes cultivated in the area which for many years has been known as the “Mendocino” vintage. Anderson Valley, because of its cooler climate, is known for its Pinot noir and sparkling wine production. Many wineries in the adjacent Sonoma, Napa and Lake counties source Mendocino grapes to blend into vintages labeled with their appellations.