San Francisco Bay Area
The San Francisco Bay Area (in English: San Francisco Bay Area, also known as The Bay Area, or simply The Bay) is a metropolitan region surrounding San Francisco Bay, United States.
This area includes large cities like San Jose, San Francisco, and Oakland, along with smaller urban and rural areas. In its entirety, the Bay Area consists of nine counties, 101 cities, and 7,000 mi². The counties are: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, and Sonoma. 
As of July 2006, the Bay Area had a population of 7.2 million. It is one of the wealthiest regions in the United States, according to the United States Census Bureau, counting household income highest median in the nation at more than $65,000 per year per capita. The Bay Area contains many cities, towns, military bases, airports, national, state, and regional parks, linked by a massive network of roads, highways, railroads, bridges, tunnels, and commuter rail.
While San Francisco is the cultural center and most recognized city in the Area, San Jose is the largest city, surpassing San Francisco for the first time in history since the 1990 census. In addition to having the highest median household income in the nation, the Bay Area has the highest per capita income of any metropolitan area in the United States and is also one of the most politically liberal areas in the nation. Standard of living as well it is one of the highest in the nation.
Some of the agencies that offer bus service include: Muni, AC Transit, SamTrans, VTA, County Connection and Golden Gate Transit.
There are several public train systems in the metropolitan area:
BART (Bay Area Rapid Transit) - A subway service for the entire area.
Caltrain - A commuter train that connects San Jose with San Francisco, and with the BART system.
University of California-Berkeley
University of California, San Francisco
University of California, Santa Cruz
San Francisco State University
San Jose State University
California State University, East Bay
San Jose City College
It is generally placed in a category by itself in terms of culture and geography, and is known locally as "The City". San Francisco is surrounded by water on three sides: north, east, and west. It is the cultural and urban center of the region, as well as being the most densely populated population center, with around 800,000 people living in just 49 square miles, making it the second most densely populated major city in the United States. United States after New York City. The limitations of the area where the city is located have been a limitation for population growth, as well as having led to an increase in real estate prices, due to the limited availability of land. San Francisco also has the largest number of switches in the entire Bay Area.
The area between San Francisco and South Bay, geographically part of the San Francisco Peninsula, is known as The Peninsula and sometimes as West Bay. This area consists of a number of small towns and suburban communities in San Mateo County and northwestern Santa Clara County, as well as the various cities along the Pacific coast, such as Pacifica and Half Moon Bay. Many of the cities and towns had been centers of rural life until the post