Los Angeles County
Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States and in the U.S. state of California, with 9,829,544 inhabitants as of 2021 U.S. Census Bureau estimates. It is the most populous non–state-level government entity in the United States. Its population is greater than that of 40 individual U.S. states. Los Angeles County has the 3rd largest metropolitan area economy in the world, with a nominal GDP of more than $1.0 trillion. At 4,083 square miles (10,570 km2) and with 88 incorporated cities and many unincorporated areas, it is home to more than one-quarter of California residents and is one of the most ethnically diverse counties in the United States. Its county seat, Los Angeles, is also California’s most populous city and the second most populous city in the United States, with about four million residents. More recently, statewide droughts in California have further strained the city and county’s water security.