The San Francisco Bay AVA is a large American Viticultural Area

American Viticultural Area

An American Viticultural Area is a designated wine grape-growing region in the United States distinguishable by geographic features, with boundaries defined by the Alcohol and Tobacco Tax and Trade Bureau , United States Department of the Treasury....

 centered around the San Francisco Bay Area

San Francisco Bay Area

The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...

 of Northern California

Northern California

Northern California is the northern portion of the U.S. state of California. The San Francisco Bay Area , and Sacramento as well as its metropolitan area are the main population centers...

. The AVA includes the counties of Alameda

Alameda County, California

Alameda County is a county in the U.S. state of California. It occupies most of the East Bay region of the San Francisco Bay Area. As of the 2010 census it had a population of 1,510,271, making it the 7th most populous county in the state...

, Contra Costa

Contra Costa County, California

Contra Costa County is a primarily suburban county in the San Francisco Bay Area of the U.S. state of California. As of the 2010 census, it had a population of 1,049,025...

, Santa Clara

Santa Clara County, California

Santa Clara County is a county located at the southern end of the San Francisco Bay Area in the U.S. state of California. As of 2010 it had a population of 1,781,642. The county seat is San Jose. The highly urbanized Santa Clara Valley within Santa Clara County is also known as Silicon Valley...

, San Francisco and San Mateo

San Mateo County, California

San Mateo County is a county located in the San Francisco Bay Area of the U.S. state of California. It covers most of the San Francisco Peninsula just south of San Francisco, and north of Santa Clara County. San Francisco International Airport is located at the northern end of the county, and...

 as well as parts of Santa Cruz

Santa Cruz County, California

Santa Cruz County is a county located on the Pacific coast of the U.S. state of California, on the California Central Coast. The county forms the northern coast of the Monterey Bay. . As of the 2010 U.S. Census, its population was 262,382. The county seat is Santa Cruz...

 and San Benito

San Benito County, California

San Benito County is a county located in the Coast Range Mountains of the U.S. state of California, south of San Jose. As of 2010 the population was 55,269. The county seat is Hollister, which includes nearly two-thirds of the county's population. El Camino Real passes through the county and...

 counties. The AVA was created in 1999 and encompasses over 1500000 acres (6,070.3 km²). The AVA falls within the larger Central Coast AVA

Central Coast AVA

The Central Coast AVA is a large American Viticultural Area that spans from Santa Barbara County in the south to the San Francisco Bay Area in the north. The boundaries of the Central Coast include portions of six counties. With around planted to wine grapes, Chardonnay accounts for more than...

, four smaller designated AVAs are contained within it: Livermore Valley AVA, Pacheco Pass AVA

Pacheco Pass AVA

The Pacheco Pass AVA is an American Viticultural Area located in the Santa Clara and San Benito counties of California. It is part of the larger San Francisco Bay AVA. The pass is a long corridor between the San Francisco Bay area to the west and the San Joaquin Valley to the east. State Route...

, San Ysidro District AVA

San Ysidro District AVA

The San Ysidro District AVA is an American Viticultural Area located in Santa Clara County, California. It is part of the larger Santa Clara Valley AVA and is located in the foothills of the Diablo Range. San Ysidro District is significantly cooler than other parts of Santa Clara Valley. Cooling...

, and Santa Clara Valley AVA

Santa Clara Valley AVA

The Santa Clara Valley AVA is an American Viticultural Area located in Santa Clara County, California. The area served an important role in the early history of California wine and was home to the pioneer winemakers Paul Masson and Charles Lefranc...

.