San Francisco officially the City and County of San Francisco, is the commercial, financial, and cultural center of Nothern California. The city proper is the fourth most populous city in California, with 808,437 residents, and the 17th most populous city in the United States as of 2022. The city covers a land area of 46.9 square miles (121 square kilometers) at the end of the San Francisco Peninsula, making it the second-most densely populated large U.S. city after New York City and the fifth-most densely populated U.S. country, behind only four of the five New York City boroughs.
