The demographics of the United States in 2026 present a detailed picture of its population, offering insights into its size, distribution, growth patterns, and the composition of its age and sex groups. These figures, based on official estimates, highlight key characteristics that define the nation's human landscape, from overall population numbers to specific life expectancy data for males and females.
Population Size, Density, and Growth
According to official estimates for 2025, the
United States is projected to have a population of 341,784,857. This represents an increase from the 2020 census figure of 331,449,281. With this population, the country's density is estimated at 96.8 individuals per square mile (37.4 per square kilometer). The population is experiencing a growth rate of 0.5% in 2025. This growth is influenced by both birth and death rates, as well as net migration. The birth rate is estimated at 10.6 births per 1,000 population, while the death rate is 9.1 deaths per 1,000 population for 2025. The net migration rate, which accounts for the movement of people into and out of the country, is estimated at 3.7 migrants per 1,000 population for 2025, with immigrants making up 15.2% of the population in 2024.
Age Structure and Life Expectancy
The age structure of the U.S. population in 2025 shows a distribution across three main categories. The youngest segment, those aged 0–14 years, is estimated to constitute 17.1% of the population. The largest group, individuals between 15 and 64 years old, makes up 64.5%. The older adult population, aged 65 and over, accounts for 18.4%. These figures indicate a significant proportion of the population in the working-age group, alongside a growing elderly demographic.
Life expectancy in the U.S. for 2024 is estimated at 79.0 years overall. When broken down by sex, there is a notable difference: males have a life expectancy of 76.5 years, while females are expected to live longer, with a life expectancy of 81.4 years. The infant mortality rate for 2024 is reported as 5.5 deaths per 1,000 live births.
Sex Ratio Across Age Groups
The sex ratio, which measures the number of males per female, also varies across different age brackets. The total sex ratio for 2023 is 0.98 males per female. At birth, the ratio is slightly higher, with 1.045 males per female in 2022. For those under 15 years of age, the ratio is 1.05 males per female in 2023. In the 15–64 years age group, the ratio is 1.01 males per female. However, among the population aged 65 and over, the ratio shifts significantly, with 0.82 males per female in 2023, reflecting the longer life expectancy for females in older age groups.
