Average longevity in the US, measured as life expectancy at birth, was 77.5 years for the period centered around 2021, reflecting a slight decline from recent historical highs. This overall figure masks meaningful variation by sex, age, and racial and ethnic group, with women consistently living longer than men and Hispanic and Asian populations typically showing higher life expectancy than White and Black populations. These averages are influenced by long-term declines in cardiovascular disease and cancer mortality, ongoing challenges from unintentional injuries and chronic lower respiratory diseases, and social determinants such as education, income, and access to care. Below, we break down the numbers, trends, and drivers to clarify what shapes longevity in the United States.
How Life Expectancy Is Measured and Why It Matters
Life expectancy at birth is a period measure that assumes a person moving through age-specific mortality rates observed in a given year or multiyear period would live, on average, to a given age. It is not a prediction of how long any individual will live, but a summary of current mortality patterns across the population. Improvements in life expectancy generally reflect progress in public health, medicine, and living conditions, while reversals can signal emerging health crises, social inequities, or system shocks. In the US, the Centers for Disease Control and Prevention (CDC) National Center for Health Statistics produces consistent annual life tables that allow monitoring of trends, shifts by race and ethnicity, and comparisons over time.
Recent Levels and Trends in US Longevity
After decades of gradual gains, life expectancy in the US plateaued in the late 2010s and declined during and immediately after the COVID-19 pandemic. Between 2019 and 2021, life expectancy at birth fell by about one year, driven largely by increases in mortality from COVID-19, unintentional injuries (especially drug overdoses), and other causes. Since 2021, there has been partial recovery, but levels remain below pre-pandemic peaks. Long-term declines in death rates from heart disease and cancer have been partially offset by rising death rates for certain younger adults and persistent inequities across racial and ethnic groups. Understanding these shifts helps contextualize where average longevity stands today and what continues to influence it.
Life Expectancy at Birth by Key Demographics (2021 Period Life Tables)
| Group | Life Expectancy at Birth (years) | Primary Notes |
|---|---|---|
| All persons | 77.5 | CDC WONDER, 21st century life tables; 2021 period |
| Female | 80.2 | Consistently higher than males; gap has narrowed over time |
| Male | 74.8 | Disparity driven by higher mortality in injuries, heart disease, and cancer |
| Hispanic | 81.6 | Historially higher life expectancy; declines observed during pandemic |
| Non-Hispanic White | 78.1 | Mid-range compared with other groups; affected by overdose and suicide trends |
| Non-Hispanic Black | 71.4 | Persistent disparity influenced by structural inequities and chronic conditions |
| Non-Hispanic Asian | 85.9 | Among the highest, though subject to recent changes and data variability |
Key Drivers of Longevity Differences
Longevity in the US is shaped by a combination of medical advances, behavioral factors, social conditions, and policy choices. Cardiovascular disease and cancer death rates have fallen, contributing to longer lives, yet injuries—particularly unintentional poisoning (overdose)—have risen sharply in recent years and now represent a major cause of premature mortality. Chronic diseases such as diabetes and respiratory conditions remain influential, especially in populations with limited access to preventive care. Social determinants, including education, neighborhood conditions, employment, and poverty, interact with health behaviors and access to care to produce enduring disparities by race, ethnicity, and income.
Major Determinants in Brief
- Medical advances: Improved cancer and heart disease treatments reduce mortality at older ages.
- Injuries and poisoning: Rising overdose and firearm injury rates have increased premature deaths, particularly among younger adults.
- Chronic conditions: Diabetes, obesity-related diseases, and respiratory illnesses contribute to excess mortality when care is limited.
- Social determinants: Education, income, housing stability, and neighborhood safety shape exposure to risks and access to care.
- Health care access and quality: Timely preventive care and treatment influence survival, with disparities linked to insurance coverage and system fragmentation.
State and Local Variation in Longevity
Longevity is not uniform across the country. Life expectancy at birth varies by several years between states, reflecting differences in health behaviors, economic conditions, public investment, and policy environments. States with stronger health systems, higher educational attainment, lower poverty, and robust public health programs tend to show higher life expectancy. Conversely, areas with high rates of drug overdose deaths, limited primary care, and structural inequities experience lower longevity. These subnational differences highlight the importance of place-based factors and policy interventions in shaping population health outcomes.
How Longevity Has Changed Over Time
Life expectancy in the US rose steadily through much of the 20th century, driven by advances in public health, vaccines, antibiotics, and treatments for chronic diseases. Gains slowed in the 2010s due to rising obesity, persistent tobacco use, and an emerging wave of drug overdose deaths. The pandemic introduced an abrupt, substantial decline in 2020–2021, reversing years of progress. Since then, partial recovery has occurred, but long-term patterns show widening inequality across groups and stagnation compared with peer nations with similar resources. Understanding this trajectory helps contextualize current average longevity and the interventions needed to restore and extend it.
Limitations and Important Considerations
Life expectancy at birth is a population-level summary and should not be interpreted as a target age for any individual. It is sensitive to deaths at younger ages, meaning that increases in overdose or injury mortality can lower average longevity even when survival past older ages is improving. Race and ethnicity categories are social constructs used in US statistics; patterns within groups are diverse, and structural factors—not innate traits—drive many observed differences. Projections of future longevity are uncertain and depend on policy choices, medical innovation, and social conditions. For these reasons, interpreting life expectancy requires attention to the underlying causes of mortality and the populations most affected.
What This Means for Individuals and Communities
For individuals, longevity statistics underscore the importance of modifiable factors such as avoiding tobacco, reducing overdose risk, maintaining physical activity, and managing chronic conditions. For communities and policymakers, they highlight the value of investments in primary care, harm reduction, education, housing, and equitable economic policies. Addressing disparities and preventing premature deaths from injuries and chronic disease can continue to improve average longevity in the US. Continued monitoring of life expectancy trends, by subgroup and region, supports targeted interventions and accountability for progress.
By combining medical advances, social support, and data-driven policies, the US can move toward more durable gains in average longevity and more equitable outcomes across populations.
As with all population health metrics, changes in average longevity reflect the cumulative effects of many factors and do not guarantee similar outcomes for every person. Readers should view these figures as indicators of public health and social conditions rather than deterministic forecasts of individual lifespan.