Los Angeles is the second-most populous city in the United States, after New York City. With an estimated population of four million, Los Angeles is the largest and most populous city in the state of California and the cultural, financial, and commercial center of Southern California.
Los Angeles is located in a large basin bounded by the Pacific Ocean on one
side and by mountains as high as 10,000 feet on the others. The
city proper, which covers about 469 square miles is the seat of Los Angeles
County, the most populated county in the country. Los Angeles is the principal
city of the Los Angeles metropolitan area; with a population of 13.1 million
residents it is the second largest in the United States after that of New York
City. It is part of the Los Angeles-Long Beach combined statistical area, also
the second most populous in the nation with a 2015 estimated population of 18.7 million.