California Population 2024 Growth Rate. This report presents preliminary state and county population estimates for july 1, 2023, revised estimates for july 1, 2020, july 1, 2021, july 1, 2022, and components. If the current rate of growth continues, california's population may even approach 41 million by 2020.
California’s population will continue to change as trends in births, deaths, international immigration, and interstate migration shift. The last official us census in 2020.