California’s population dips as it remains the nation’s most populous state

California remains the United States’ most populous state with 39,355,309 residents, even though the number slipped slightly from 39,364,774 the year before. Data compiled by CalMatters indicate that between 2010 and 2024 nearly 10 million Californians relocated to other states, while just over 7 million newcomers arrived. This trend places California among only five states experiencing a net population decline, with Vermont losing the largest share at about 0.3% and Hawaii at 0.2%.

In contrast, South Carolina and North Carolina were among the fastest-growing states, adding 1.46% and 1.32% respectively, and Utah emerged as the nation’s youngest state with a median age of 33. The report notes that while overall U.S. growth has slowed to below 1% annually, population shifts can affect labor markets, consumer bases, housing demand and affordability. SmartAsset highlighted that a shrinking population may ease pressure on housing and infrastructure for existing residents.