California is not only America's leader in wine production, but one of the world leaders as well. Their wine comes from as far north as Mendocino County to as far south as Temecula Valley. No matter what the region, California is renowned for its optimal climate and big, fruity wines.

Napa Valley, Sonoma, Mendocino County, Lake County

Mendocino Winegrowers Alliance
Their website offers the history and background of wine in Mendocino county, as well as a listing of the many wineries and brew pubs located there. The site also features a number of tourist-friendly items, including recommended driving tours, wine event postings and links to other county attractions.

Napa Valley Grape Growers
The mission of the Napa Valley Grapegrowers is to promote and protect the interests of Napa Valley’s premium grape growers through education, advocacy on grape commodity issues, and outreach to the community to maintain Napa Valley’s reputation as one of the premiere wine grape growing regions in the world.

Napa Valley Vintner's Association
This association of Napa Valley winemakers works to promote and protect the region's winegrowing reputation as one of the finest in the world. Website offers press releases, information and calendar of events.

Napa Valley Winegrape Growers
Since its inception in 1992, the Lake County Winegrape Commission has marketed the premium Lake County winegrape growing region to new and existing grape buyers and wineries all over California. The Commission also assists growers in a variety of activities including educational and research programs that benefit growers' vineyard development.

Russian River Wine Road Association
Founded over twenty years ago, the Russian River Wine Road is an association of wineries and lodgings in the Alexander Valley, Dry Creek Valley, Russian River Valley, Chalk Hill and Coastal regions of Northwest Sonoma County. The Wine Road, which started as an organization of nine wineries, today has a strong membership of 120 wineries and 50 lodgings.

Stags Leap District Winegrowers
The Stags Leap District, an official appellation within Napa Valley, begins seven miles north of the town of Napa, on the Silverado Trail. This alliance of wineries and grape growers benefits from the district's cool Pacific breezes, long, dry summer days and unique volcanic soils with overlays of bale loam, which produces wines of power and complex layers of flavor. The area is compact—it is one of Napa Valley's smallest appellations with only fifteen wineries—so it’s easy to hop from one winery to another.

Santa Cruz, Monterey, Paso Robles, Santa Barbara, Santa Ynez Valley

Monterey County Vintners and Growers Association
The organization brings together the talents and resources of members, partners and community in order to promote and support the county's leadership in the wine industry. Free winery maps and event listings are available on their website.

The Paso Robles Westside Grand Crew
An association of family wine estates established on the west side of Paso Robles. The proprietors have varied backgrounds, but share the same love of terroir that results from the growing conditions and climate of their location.

Paso Robles Vintners and Growers Association
The Paso Robles Vintners and Growers Association is a non-profit organization that communicates, reinforces and enhances its status as a world-class wine region through marketing, promotion and educational resources.

San Luis Obispo Vintners and Growers Association
A local organization representing more than 30 area wineries. The association promotes tourism of the San Luis Obispo wine country, as well as sponsors events, including a wine and food festival held in the spring.

Santa Barbara County Vintners' Association
The Santa Barbara County Vintners' Association is a non-profit organization founded in 1983 to support and promote Santa Barbara County as a premium wine producing and wine grape growing region. The Vintners’ Association produces festivals, seminars and tastings and provides information to consumers and the wine and travel media.

Amador County, Calaveras County, Mariposa

Amador Vintner's Association
This association of 25 wineries from Amador County lists essential information about visiting Amador wine country, profiles of member wineries, descriptions of Amador's leading grape varieties and wines, and news about special events and other attractions.

Lodi, Woodbridge

Lodi Appellation Winery Association
The association's site contains a map and listing of all wineries in Lodi, as well as a calendar for wine tastings and events. Contact information available.

Lodi-Woodbridge Winegrape Commission
In 1991 local growers voted to fund the Lodi-Woodbridge Winegrape Commission. With its $1,000,000 annual budget the Commission conducts programs in marketing, grower education and viticultural research. The Commission represents almost 800 winegrowers farming nearly 80,000 acres of winegrapes, and has successfully moved the Lodi region well into the 21st Century.

Temecula, San Diego, Los Angeles, Orange County

Temecula Valley Winegrowers
The Winegrowers Association is a nonprofit regional organization dedicated to promoting the making and growing of quality wine & winegrapes in the Temecula Appellation.

San Diego County Vintners Association
A group of the finest wine makers in San Diego County

Wine Institute of California
Wine Institute is the public policy advocacy association of California wineries. Wine Institute brings together the resources of 840 wineries and affiliated businesses to support legislative and regulatory advocacy, international market development, media relations, scientific research, and education programs that benefit the entire California wine industry.

P.S. I Love You
An advocacy group for Petite Sirah, it currently has 77 members, consisting of wineries and wine clubs. Along with an annual Petite Sirah Symposium for members of the trade to discuss the varietal’s viticulture and marketing, the group organizes interactive seminars at various wine events.