San Francisco - the city and county

The City and County of San Francisco is the fourth most populous city in California and the 14th most populous city in the United States, with a 2007 estimated population of 764,976. Among the most densely populated cities in the country, San Francisco is part of the San Francisco Bay Area metropolitan area, which is home to more than 7.2 million people. The city is located at the tip of the San Francisco Peninsula, with the Pacific Ocean to the west, San Francisco Bay to the east, and the Golden Gate to the north. (from wikipedia)