San Francisco is the cultural, commercial and financial center of Northern California. The city is also a popular tourist destination, known for its cool summers, fog, steep rolling hills, eclectic mix of architecture and landmarks including the Golden Gate Bridge, cable cars, the former prison on Alcatraz Island and its Chinatown district. Of all major cities in the United States, San Francisco has the second-highest percentage of residents with a college degree, behind only Seattle. Over 44% of adults within the city limits have a bachelor’s or higher degree. San Francisco has a diversified service economy, with employment spread across a wide range of professional services, including financial services, tourism and high technology. San Francisco is the headquarters of five major banking institutions and has seen a large growth in the number of technology firms that have made their headquarters in the city.
San Francisco has a population of approximately 850,000 and is the second-most densely populated major American city.