An Update to the Demographic Outlook, 2025 to 2055

Congressional Budget Office

Research

15 Pages

CBO projects that the U.S. population will increase from 350 million people in 2025 to 367 million people in 2055. It will be smaller and grow more slowly over the next 30 years, on average, than the agency previously projected it would.

Date published: September 2025

Key Takeaways

Lower immigration path: Incorporates recent administrative and legislative actions that reduce projected net immigration through the early 2030s.
Aging population profile: Projects fewer people in prime working ages and earlier onset of natural decrease when deaths exceed births.
Higher forecast uncertainty: Emphasizes that small changes in fertility, mortality or immigration can compound into large long term population differences.
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