San Diego Population Decline Raises Concerns

Experts say drop in immigration is a key factor behind the city's shrinking numbers.

Apr. 5, 2026 at 1:06pm

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San Diego, California has seen a decline in its population in recent years, raising concerns among local officials and experts. The drop in immigration has been identified as a key factor behind the shrinking numbers, though the overall impact on the city remains a topic of debate.

Why it matters

Population changes can have significant implications for a city's economy, infrastructure, and social services. As one of the largest cities in California, San Diego's population trends are closely watched and can provide insights into broader demographic shifts in the state.

The details

According to data from the U.S. Census Bureau, San Diego's population has declined by around 1.5% over the past five years. Experts attribute this primarily to a drop in immigration, both from other countries and from other parts of the United States. The COVID-19 pandemic and its economic impacts are also believed to have played a role in the population decline.

  • San Diego's population has declined by around 1.5% over the past five years, according to U.S. Census Bureau data.

The players

Michael Smolens

A columnist for The San Diego Union-Tribune who has written extensively on the city's population trends.

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What they’re saying

“Drop in immigration is a key factor”

— Michael Smolens, Columnist

The takeaway

While San Diego's population decline may be cause for some concern, experts caution against panic. The city's economic and social resilience will be tested as it navigates these demographic shifts, and policymakers will need to carefully consider the implications for the city's future.