San Francisco is a city located in the state of California, United States. It is the cultural, commercial, and financial center of Northern California, and is known for its diverse population, beautiful scenery, and iconic landmarks.

San Francisco is situated on the west coast of the United States and is surrounded by the Pacific Ocean, the San Francisco Bay, and the Golden Gate strait. The city is built on hills, giving it a unique and picturesque landscape.

San Francisco is home to a number of famous landmarks, including the Golden Gate Bridge, Alcatraz Island, and the cable cars. The city also has a vibrant culture and is home to a number of museums, including the California Palace of the Legion of Honor, the Museum of the African Diaspora, and the Exploratorium.

The city is also known for its diverse neighborhoods, such as Chinatown, the Castro, and Haight-Ashbury, each with its own unique culture, history and architecture.

San Francisco is also a major center of higher education and research, with institutions such as the University of California, San Francisco, and Stanford University located nearby.

The city is a major tourist destination and attracts millions of visitors each year. It is known for its mild climate, diverse culture, and beautiful natural surroundings, making it a popular destination for tourists, students, and business travelers alike.