San Francisco, officially the City and County of San Francisco, is a global hub for commerce, finance, and culture in Northern California. With a population of 815,201 as of 2021, it is the fourth most populous city in California and the second most densely populated large city in the U.S. Known for its iconic landmarks like the Golden Gate Bridge and Alcatraz Island, San Francisco is also a leader in technology, innovation, and the arts, with a thriving economy and a rich cultural history.
