Los Angeles, officially the City of Los Angeles and often known by its initials L.A., is the most populous city in California; the second most populous city in the United States, after New York City; and the third most populous city in North America, after Mexico City and New York City. With an estimated population of nearly four million people, Los Angeles is the cultural, financial, and commercial center of Southern California. The city is known for its Mediterranean climate, ethnic diversity, the entertainment industry, and its sprawling metropolis.
Los Angeles lies in a basin in Southern California, adjacent to the Pacific Ocean, with mountains as high as 10,000 feet, and deserts. The city, which covers about 469 square miles, is the seat of Los Angeles County, the most populous county in the United States. With a population of 13.1 million people, the Los Angeles metropolitan area is the second-largest metropolitan area in the nation after the New York metropolitan area. The Los Angeles combined statistical area, also known as Greater Los Angeles, includes the metro areas of Los Angeles–Long Beach–Anaheim, Riverside–San Bernardino–Ontario, and Oxnard–Thousand Oaks–Ventura.