Los Angeles County, also known as L.A. County, officially the County of Los Angeles, is a county in the U.S. state of California. As of the 2010 census, the county has a population of 9,818,605, making it the most populous county in the United States. Los Angeles County alone is more populous than 42 individual U.S. states. The county seat is the city of Los Angeles, the largest city in California and the second-largest city in the United States (after New York City).
Los Angeles County also includes two offshore islands, San Clemente Island and Santa Catalina Island. The county is home to 88 incorporated cities and many unincorporated areas. At 4,083 square miles (10,570 km2), it is larger than the combined areas of the states of Rhode Island and Delaware.
The county is home to over a quarter of all California residents and is one of the most diverse counties in the country.
Los Angeles (i/lɔːs ˈændʒələs/, /lɔːs ˈæŋɡələs/ or i/lɒs ˈændʒəliːz/; Spanish: [los ˈaŋxeles], which is written Los Ángeles, Spanish for The Angels), officially the City of Los Angeles, often known by its initials L.A., is the most populous city in the U.S. state of California and the second most populous in the United States, after New York City, with a population at the 2010 United States Census of 3,792,621. It has an area of 469 square miles (1,215 km2), and is located in Southern California.