Us Population 2025 Demographics Predictions. Net immigration increasingly drives population growth, accounting for all population growth beginning in 2040. The aging of the population is fueled by the large number of baby boomers born between 1946 and 1964 entering high mortality ages.

The current population of united states is 346,621,437 as of february 20, 2025, based on interpolation of the latest united nations data. The population growth rate for 2025 is projected at 0.52 percent, the 140th highest among 237 countries and dependent territories.