San Francisco Bay Area contains zero cities.
The San Francisco Bay Area -LRB- referred to locally as the Bay Area -RRB- is a populous region surrounding the San Francisco and San Pablo estuaries in Northern California .. California. California. San Francisco. San Francisco. San Pablo. San Pablo Bay. estuaries. estuary. Northern California. Northern California. The region encompasses the major cities and metropolitan areas of San Jose , San Francisco , and Oakland , along with smaller urban and rural areas .. San Francisco. San Francisco. San Jose. San Jose, California. Oakland. Oakland, California. The Bay Area 's nine counties are Alameda , Contra Costa , Marin , Napa , San Francisco , San Mateo , Santa Clara , Solano , and Sonoma .. San Francisco. San Francisco. Santa Clara. Santa Clara County, California. San Mateo. San Mateo County, California. Alameda. Alameda County, California. Contra Costa. Contra Costa County, California. Marin. Marin County, California. Napa. Napa County, California. Solano. Solano County, California. Sonoma. Sonoma County, California. Home to approximately 7.68 million people , the nine-county Bay Area contains many cities , towns , airports , and associated regional , state , and national parks , connected by a network of roads , highways , railroads , bridges , tunnels and commuter rail .. commuter rail. commuter rail. The combined statistical area of the region is the second-largest in California -LRB- after the Greater Los Angeles area -RRB- , the fifth-largest in the United States , and the 43rd-largest urban area in the world .. United States. United States. California. California. Greater Los Angeles. Los Angeles metropolitan area. 43rd-largest urban area in the world. List of urban areas by population. The Bay Area has the second-most Fortune 500 Companies in the United States , and is known for its natural beauty , liberal politics , entrepreneurship , and diversity .. United States. United States. Fortune 500. Fortune 500. liberal. Modern liberalism in the United States. diversity. Demographics of California. The area ranks second in highest density of college graduates , and performs above the state median household income in the 2010 census ; it includes the five highest California counties by per capita income and two of the top 25 wealthiest counties in the United States .. United States. United States. California. California. California counties by per capita income. California locations by per capita income. wealthiest counties in the United States. Richest counties in the United States. Based on a 2013 population report from the California Department of Finance , the Bay Area is the only region in California where the rate of people migrating in from other areas in the United States is greater than the rate of those leaving the region , led by Alameda and Contra Costa counties .. United States. United States. California. California. Alameda. Alameda County, California. Contra Costa. Contra Costa County, California. California Department of Finance. California Department of Finance