San Francisco, officially the City and County of San Francisco, is the leading financial and cultural center of Northern California and the San Francisco Bay Area.
The only consolidated city-county in California, it encompasses a land area of about 46.9 square miles (121 km2) on the northern end of the San Francisco Peninsula, giving it a density of about 17,179 people per square mile (6,632 people per 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 major city in the United States after New York City. San Francisco is the fourth most populous city in California and the 14th most populous city in the United States, with a population of 805,235 as of the 2010 Census. The city is also the financial and cultural hub of the larger San Jose-San Francisco-Oakland metropolitan area, with a population of 7.6 million.
San Francisco (Spanish for “Saint Francis”) was founded on June 29, 1776, when colonists from Spainestablished a fort at the Golden Gate and a mission named for St. Francis of Assisi a few miles away. TheCalifornia Gold Rush of 1849 brought rapid growth, making it the largest city on the West Coast at the time.
Today, San Francisco is one of the top tourist destinations in the world, and is renowned for its cool summers, fog, steep rolling hills, eclectic mix of architecture, and landmarks including the Golden Gate Bridge, cable cars, the former prison on Alcatraz Island, and its Chinatown district. It is also a primary banking and finance center.
Source : Wikipedia