Los Angeles County's population has now dipped to just under 9.7 million, marking a continuation of a steady slide for the nation's most populous county. The raw number of departures is eye-catching, but experts say the broader trend may be even more concerning: fewer people are coming in to replace those who leave.
"Domestic migration patterns continue to redistribute the population from the largest counties to less populous ones. Collectively, the 50 counties with 1 million or more people in 2025 had a net domestic migration loss of 637,634."