

As of 2020, the metropolitan area, with 6.7 million residents, ranked 5th by GDP ($874 billion) and 2nd by GDP per capita ($131,082) across the OECD countries, ahead of global cities like Paris, London, and Singapore.

San Francisco and the surrounding San Francisco Bay Area are a global center of economic activity and the arts and sciences, spurred by leading universities, high-tech, healthcare, FIRE, and professional services sectors. Colloquial nicknames for San Francisco include SF, San Fran, The City, Frisco, and Baghdad by the Bay. cities proper with more than 100,000 residents, San Francisco was ranked first by per capita income (at $133,856 ) and fifth by aggregate income as of 2019. county, behind only four of the five New York City boroughs. city after New York City, and the fifth most densely populated U.S. It 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. The city proper is the fourth most populous in California and 17th most populous in the United States, with 815,201 residents as of 2021.

San Francisco ( / ˌ s æ n f r ə n ˈ s ɪ s k oʊ/ Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California.
