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Wikipedia: The City and County of San Francisco is the fourth most populous city in California and the 12th most populous city in the United States, with a 2008 estimated population of 808,976. The only consolidated city-county in California, it encompasses a land area of 46.7 square miles (121 km) on the northern end of the San Francisco Peninsula, making it the second-most densely populated large city (greater than 200,000 population) in the United States. San Francisco is also the financial, cultural, and transportation center of the larger San Francisco Bay Area, a region of 7.4 million people.
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![Fog is a regular feature in San Francisco. [Fog is a regular feature in San Francisco.]](http://images.ookaboo.com/photo/s/San_francisco_in_fog_with_rays_2_s.jpg)