California Population Projections 2024. This report provides revised population and housing estimates as of january 1, 2023, and provisional population and housing estimates as of january 1, 2024, for the state, counties, and cities and includes a calculation of annual percent change. Usafacts uses census data to break down the population of california by race, age, and more.

Cities featured on the most populous and highest density lists feature populations of 5,000 or more on july 1, 2023. People had flocked to the state for its farmland, beaches and it industries.