United States of America is a country in North America (Northern America) with a total population of 340,110,988 as of 2024. It covers an area of 9,833,520 km², resulting in a population density of 36.8 people per km².

The average life expectancy is 78.4 years (75.8 for men, 81.1 for women). The fertility rate stands at 1.62 children per woman, and the median age of the population is 40.2 years.

The country's population growth rate is 0.98% per year. Net migration is 1,286,132 people, indicating that more people are moving into the country than leaving. The infant mortality rate is 5.5 per 1,000 live births.

Demographic Profile

United States of America is located in Northern America, a part of North America, and covers an area of 9,833,520 km². With a population of 340,110,988, the country has a population density of 36.8 inhabitants per square kilometer, which is below the global average of approximately 60 people per km².

The demographic structure of United States of America reveals an aging population. The median age of 40.2 years means that half of the population is younger and half is older than this age. This aging population structure poses challenges for pension systems, healthcare provision, and the labor market, as the ratio of working-age to retired individuals continues to decline.

Health and Longevity

Life expectancy in United States of America stands at 78.4 years overall — 75.8 years for men and 81.1 years for women. This places the country among those with high life expectancy globally, reflecting well-developed healthcare systems and living standards. The infant mortality rate is 5.5 per 1,000 live births, which is considered very low and indicates excellent maternal and infant healthcare.

Fertility and Population Growth

The total fertility rate (TFR) of 1.62 children per woman is below the replacement level of 2.1, which without immigration leads to population decline over time. The population is growing at a rate of 0.98% per year. This moderate growth rate reflects a balance between natural increase and migration patterns.

Migration

Net migration in United States of America is 1,286,132 people, meaning more people are moving into the country than leaving. The country serves as a destination for migrants, which helps offset low natural population growth and fills labor market needs.

Outlook

Based on current demographic trends, United States of America's population dynamics reflect broader patterns seen across Northern America. As the population ages, adapting social security systems and healthcare to serve a growing elderly population will be a key challenge.