Table 1. Total U.S. Resident Population: Middle, Lowest and Highest Series, 1999 to 2100 [Middle Series. As of July 1] Year Total Population (millions) Middle SeriLowest SeriHighest Series 1999 272.8 272.7 273.0 2025 337.8 308.2 380.4 2050 403.7 313.5 552.8 2075 480.5 304.0 809.2 2100 571.0 282.7 1,182.4 Source: Population Projections Program, Population Division, U.S. Census Bureau, Washington, D.C. 20233.