San Francisco

San Francisco Lightandtruth, CC BY-SA 4.0

Consolidated city and county in California, United States

San Francisco, officially the City and County of San Francisco, is the fourth-most populous city in California and the 17th-most populous in the United States, with a population of 826,079 in 2025. Among U.S. cities with a population of 200,000 or more, San Francisco is ranked first by per capita income, second by population density, and sixth by aggregate income as of 2024. Some 4.6 million residents live in the city's metropolitan statistical area, which is the 13th-largest in the United States. Around 9.2 million live in the San Jose–San Francisco–Oakland combined statistical area, the fifth-largest in the United States.

Also known as...San Francisco, California, The City by the Bay, SF, SFO, The Golden City, Paris of the West, Baghdad by the Bay, San Francisco County, San Francisco County, California, San Fran, Frisco, City and County of San Francisco, San Francisco, CA, and San Francisco, Calif.
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