San Francisco (initials SF[23]) (sæn frənˈsɪskoʊ, Spanish for Saint Francis; Spanish: [san franˈsisko]), officially the City and County of San Francisco, is the cultural, commercial, and financial center of Northern California. The consolidated city-county covers an area of about 47.9 square miles (124 km2)[24] at the north end of the San Francisco Peninsula in the San Francisco Bay Area. It is the fourth-most populous city in California, and the 13th-most populous in the United States, with a 2016 census-estimated population of 870,887.[20]