The average lifespan of a woman in the United States is 81.4 years, based on 2024 data from the National Center for Health Statistics. That figure rose slightly from 81.1 in 2023, continuing a rebound after the sharp drop caused by the COVID-19 pandemic. But 81.4 is a national average, and the real number for any individual woman varies widely depending on where she lives, her income, and her race.
How US Women Compare Internationally
Despite spending more on healthcare than any other nation, the United States lags behind most wealthy countries when it comes to women’s longevity. Across OECD nations, women live an average of 83.7 years, nearly two and a half years longer than American women. Countries like Spain, Japan, and Switzerland lead the pack, with life expectancies above 80 for both sexes combined. The US falls into a lower tier alongside countries where life expectancy sits between 75 and 80.
Several factors explain the gap. Rising obesity and diabetes rates have slowed improvements in heart disease and stroke deaths. The opioid crisis has killed a disproportionate number of working-age adults. And access to healthcare remains uneven in ways that most peer nations don’t experience.
The State-by-State Gap Is Nearly 8 Years
Where you live in the US matters enormously. In 2022, women in Hawaii had the longest life expectancy at 83.0 years. Women in West Virginia had the shortest at 75.1 years. That’s a 7.9-year gap between the best and worst states, a difference large enough to represent a fundamentally different experience of aging and health.
States with longer female lifespans tend to have higher incomes, better access to healthcare, lower smoking rates, and lower rates of obesity. The pattern isn’t random. It tracks closely with broader measures of economic and social well-being.
Income Changes Lifespan More Than It Used To
The gap between wealthy and low-income women has widened dramatically over the past few decades. A Brookings analysis found that women who turned 50 in 1970 and earned in the bottom tenth of incomes had a life expectancy of about 80.4 years. Women in the top tenth could expect to live to 84.1, a gap of roughly three and a half years.
Two decades later, the picture had shifted sharply. For women who reached 50 in 1990, low earners saw no improvement at all. Their life expectancy stayed flat. But women in the top tenth of earners gained 6.4 years, pushing their expected lifespan to 90.5. The gap between the richest and poorest women more than tripled, from three and a half years to over ten. That trend reflects widening disparities in access to quality food, safe neighborhoods, preventive care, and lower-stress living conditions.
Why Women Outlive Men
American women outlive American men by about five years (81.4 vs. 76.5), and this gender gap exists in every country on Earth. The reasons are partly biological and deeply rooted in genetics.
Women carry two X chromosomes, and that turns out to be a significant advantage. The X chromosome holds the highest density of brain-related genes of any chromosome, making up about 5 percent of the human genome. Research in mice found that animals with two X chromosomes lived longer than those with one X and one Y, regardless of whether they had ovaries or testes. The XX mice also performed better on memory and spatial learning tests. At least 15 percent of genes on the “silenced” second X chromosome actually escape that silencing, producing higher levels of protective proteins in XX cells.
One gene in particular, which produces a protein that controls how DNA is read and expressed, appears especially important. Cells with two X chromosomes produce more of this protein and show greater resistance to neurotoxins, including the misfolded proteins linked to Alzheimer’s disease. Reducing levels of this protein in XX cells made them more vulnerable, essentially erasing part of the female advantage.
Hormones play a role too. Estrogen offers cardiovascular protection for much of a woman’s life, and the patterns of age-related inflammation differ between men and women. Brain imaging of over 200 adults found that female brains appear metabolically younger than male brains of the same age by roughly three years. DNA studies confirm the pattern: when researchers examined epigenetic markers that reflect biological aging, men consistently appeared “older” than women at the same chronological age.
Leading Causes of Death for US Women
Heart disease is the top killer of American women, responsible for 19.1% of female deaths. Cancer follows closely at 17.6%. After those two dominant causes, stroke accounts for 5.7% and Alzheimer’s disease for 5.1%. Many people assume breast cancer is the greatest health threat women face, but heart disease kills far more women each year.
The risk profile shifts with age. Younger women are more likely to die from accidents, cancer, or pregnancy-related complications. After 65, heart disease, stroke, and Alzheimer’s become the primary threats. Many of the factors that influence these causes, including blood pressure, cholesterol, physical activity, and smoking, are modifiable, which is why lifestyle differences between income groups and geographic regions show up so clearly in the lifespan data.
How the Pandemic Changed the Numbers
Female life expectancy in the US took a historic hit during the COVID-19 pandemic. The 2024 figure of 81.4 years represents a continued recovery, with a 0.3-year gain over 2023. COVID-19 was the third leading cause of death for women in 2021, accounting for 11.1% of all female deaths that year. While that share has dropped considerably since then, the pandemic exposed and worsened existing disparities in health access and outcomes that continue to shape life expectancy across different communities.