California’s population is stagnating as immigration and birth rates decline
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by Dan Walters
June 5, 2026
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California’s population exploded during and immediately after World War II, from 6.9 million in 1940 to 19.9 million in 1970, thanks to waves of migrants from other states drawn to California’s surging economy and the famous postwar baby boom.
California absorbed its 13 million new residents by expanding its public infrastructure of schools, colleges, highways, parks and water systems and by welcoming immense private investment in new housing, new retail complexes, new factories and new office buildings.
Population growth slowed in the 1970s in the aftermath of the baby boom and as an economic evolution, from manufacturing to technology and services, changed the job market. The leading politician of the decade, Gov. Jerry Brown, declared that California had entered “an era of limits” and major infrastructure expansion was no longer needed.
https://calmatters.org/commentary/2026/06/california-population-birth-rates-immigration/