California Population 2024 Projections By County. The most populous counties in california are los angeles county with 9,663,345, san diego county at 3,269,973, orange. For example, 2000 refers to july 2000 and measures change since july.
For example, 2000 refers to july 2000 and measures change since july. California population and housing estimates from april 1, 2020 to january 1, 2024.