Start with your auto license in California, San Francisco is officially the City and County of San Francisco is the financial, cultural and transportation of the San Francisco Bay, an area of ??7.15 million, which includes San Jose and Oakland. The only consolidated city-county in California, It covers an area of ??approximately 46.9 square miles (121 km2) at the northern tip of the peninsula of San Francisco, giving a density approximately 17 179 persons per square kilometer (6632 persons per km2). It is the city’s most densely populated large (population over 200,000) in the State of California and the second most densely populated city in the major United States after New York. San Francisco is the fourth most populous city in California and the 13 most populous city in the United States, with a population of 805,235, including the 2010 census.