California Population 2024 Trends And Trends. The population of california in 2020 was 39,503,200, a 0.17% increase from 2019. California is a large state on the west coast of the united states that is home to one of the world's most diverse populations.

Discover california’s population & how it has changed over time. California is the most populous state in the us with a nominal gdp at $3.9 trillion usd, 5th highest in the world and 14.2% of the united states.