The Valley

The East Bay is a commonly used, informal term for the lands on the eastern side of the San Francisco Bay, in the San Francisco Bay Area in California. Originally referring only to cities along the immediate northeast shore of the San Francisco Bay and the southeast shore of San Pablo Bay, the region described as the "East Bay" has grown with the expansion of the Bay Area's population and infrastructure to include all of Alameda and Contra Costa counties, and even some farther outlying cities.

San Francisco, officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area. The only consolidated city-county in California, it encompasses a land area of 46.9 square miles (121 km2) on the northern end of the San Francisco Peninsula, giving it a density of 17,179 people per square mile (6,632/km2). It is the most densely settled large city (population greater than 200,000) in the state of California and the second-most densely populated large city in the United States.

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 Silicon Valley begins at the southern end. The county seat is Redwood City. It is strongly Democratic and ethnically diverse. The county's built-up areas are mostly suburban with some areas being very urban, and are home to several corporate campuses.

The Santa Clara Valley (also known as Silicon Valley) is a valley just south of the San Francisco Bay in Northern California in the United States. Much of Santa Clara County and its county seat, San José, are in the Santa Clara Valley. The valley was originally known as the Valley of Heart’s Delight for the miles and miles of orchards, flowering trees, and plants. Until the 1960s