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The Bay Area consists of nine counties (Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma) and 101 municipalities. One, San Francisco, is a consolidated city–county .
The Association of Bay Area Governments defines the Bay Area as including the nine counties that border the estuaries of San Francisco Bay, San Pablo Bay, and Suisun Bay: Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara, Solano, Sonoma, and San Francisco.
27 sie 2023 · The county seat and largest city is San Jose; with about 1,000,000 residents, it is the 10th-most populous city in the United States, California's third-most populous city and the most populous city in the San Francisco Bay Area. The second- and third-largest cities are Sunnyvale and Santa Clara.
***As of November 2023, this map has been updated to use a new format. For details, please see here .*** Bay area county areas
The region encompasses the major cities and metropolitan areas of San Jose, San Francisco, and Oakland, along with smaller urban and rural areas. The Bay Area's nine counties are Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma.
Bay Area. The San Francisco Bay Area, ringing the San Francisco Bay in northern California, is a geographically diverse and extensive metropolitan region that is home to nearly 8 million inhabitants in cities such as San Francisco, Oakland, Berkeley and San Jose. Map. Directions. Satellite. Photo Map.
The nine counties in the San Francisco Bay Area. The San Francisco Bay Area, also known as the Bay Area, is a metropolitan area that goes around the San Francisco Bay in Northern California. It includes the cities of San Francisco, San José, and Oakland, and their many suburbs.
