Will immigration account for all U.S. population growth in coming decades?
Core argument: CBO projects the U.S. population rises from 350 million in 2025 to 372 million in 2055, an average 0.2% annual growth rate, less than one-quarter of the 0.9% average pace from 1975 to 2024.
In CBO’s projections, the population increases from 350 million people in 2025 to 372 million people in 2055, growing at an average rate of 0.2% per year. That rate is less than one-quarter of the average growth rate seen from 1975 to 2024 (0.9% per year). The annual number of births is projected to exceed the annual number of deaths through 2032. Those net births account for about one-sixth of projected population growth during that period; net immigration accounts for the rest. Beginning in 2033, annual deaths exceed annual births in CBO’s projections, and net immigration is projected to more than account for the population growth from 2033 to 2055.

