In CBO’s projections, the U.S. population increases from 336 million people in 2023 to 373 million people in 2053, growing by 0.3 percent per year, on average, about one-third the pace experienced from 1983 to 2022 (0.8 percent). Over the next decade, immigration accounts for about three-quarters of the overall increase in the size of the population, and the greater number of births than deaths accounts for the remaining one-quarter. After 2033, population growth is increasingly driven by net immigration, which accounts for all population growth beginning in 2042.