Los Angeles County California Population 2024. The most populous counties in california are los angeles county with 9,663,345, san diego county at 3,269,973, orange county with 3,135,755, riverside county at. Los angeles county, california has 4,060.2 square miles of land area and is the 11th largest county in california by total area.
Usafacts uses census data to break down the population of los angeles county by race,. Los angeles county, california has 4,060.2 square miles of land area and is the 11th largest county in california by total area.
