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San Francisco

San Francisco, officially the City and County of San Francisco, is the 17th-most populous city and second-densest large city in the United States, with a population of 826,079 in 2025. It is the fourth-largest city in California. 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. San Francisco is a global center for technology and finance, and is well-known for its affluence, eclectic architecture, and mild climate.

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