In CBO’s projections, the U.S. population grows from 349 million people in 2026 to 364 million in 2056, and the average age rises. Starting in 2030, annual deaths exceed annual births, and net immigration accounts for all population growth.
The Demographic Outlook: 2026 to 2056
Congressional Budget Office
Research
39 Pages
Key Takeaways
Population: The Social Security area population is projected to increase from 349 million people this year to 364 million in 2056.
Population Growth: On the basis of recent laws, policies, and demographic trends, CBO projects that the rate of population growth will generally slow over the next 30 years, from an average of 0.3 percent a year in the next decade to an average of 0.1 percent a year from 2037 to 2056.
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