Immigration Is the Only Thing Propping Up California’s Population

California’s population grew 0.6% in 2024, adding nearly 250,000 residents to reach 39.43 million, according to Census Bureau estimates. The growth came entirely from a rebound in international immigration, which surged to over 300,000 people after plunging to 44,000 during the pandemic’s worst year.

Without immigration, the state would have shrunk significantly as domestic migration remained negative. The H-1B visa program alone brought nearly 79,000 skilled workers to California in 2024. Since 2010, California has added 2.7 million immigrants, with half coming from Asia and slightly more than a third from Latin America. The immigration-dependent growth model puts California at particular risk from potential federal policy changes, as more than a quarter of its population is foreign-born — the highest share nationwide.