Los Angeles metropolitan area

The Los Angeles metropolitan area, also known as Metropolitan Los Angeles or the Southland, is the 18th largest metropolitan area in the world and the second-largest metropolitan area in the United States. It is entirely located in the southern portion of the U.S. State of California.

The metropolitan area is defined by the Office of Management and Budget as the Los Angeles-Long Beach-Anaheim, CA Metropolitan Statistical Area (MSA), consisting of Los Angeles and Orange counties, a metropolitan statistical area used for statistical purposes by the United States Census Bureau and other agencies. Its land area is 4,850 sq. mi (12,562 km²).

Los Angeles and Orange counties are the first and third most populous counties in California respectively, and Los Angeles, with 9,819,000 people in 2010, is the most populous county in the United States. The combined Los Angeles metropolitan area is home to 18.2 million people, making it the most populous metropolitan area in the western United States and the largest in area in the United States. The metro area has at its core the Los Angeles-Long Beach-Anaheim corridor, an urbanized area defined by the Census Bureau with a population 12,150,996 as of the 2010 Census.

The Census Bureau also defines a wider region based on commuting patterns, the Los Angeles-Long Beach, CA Combined Statistical Area (CSA), more commonly known as the Greater Los Angeles Area, with an estimated population of 18,238,998. This includes the three additional counties of Ventura, Riverside, and San Bernardino. The total land area of the combined statistical area is 33,955 sq. mi (87,945 km²).