New population estimates released by the U.S. Census Bureau show that San Diego’s population declined by 5,924 between July 2024 and July 2025 to around 3.282 million people. The last time that San Diego’s population fell year over year was in 2021.
San Diego loses ground with latest population estimates
International migration pulls back
By Joshua Ohl
CoStar AnalyticsApril 6, 2026 | 3:59 P.M.
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