Where you live in the United States can still strongly determine how long you live, according to a comprehensive study by researchers at Yale. Despite remarkable medical and technological advances over the last century, several U.S. states, particularly in the South, have seen almost no progress in life expectancy—especially among women. This revelation comes from an extensive analysis of death data from 179 million people born between 1900 and 2000, shedding light on how geography and state policy continue to influence health outcomes.
The study shows that from 1900 to 2000, the nationwide life expectancy rose significantly: from 73.8 to 84.1 years for women, and from 62.8 to 80.3 years for men. But when the data is broken down by state, glaring disparities emerge. In some Southern states, women have gained less than two years of life expectancy over the past century. In states like West Virginia, Kentucky, Arkansas, Mississippi, and Oklahoma, women born in 2000 barely outlive those born in 1900. Oklahoma women, in particular, have actually seen a decrease in life expectancy over that time span. Meanwhile, men in these states did show more improvement, but they still lag far behind their counterparts in other parts of the country.
For instance, men born in Mississippi in 2000 had a life expectancy of 71.8 years, up from 62.3 in 1900. In Alabama, the increase was from 62.5 to 72.6. Though these are improvements, they pale in comparison to those seen in the Northeast or on the West Coast. Some states, including Florida, Texas, and Virginia, have bucked the Southern trend, with both men and women reaching the top 20 in life expectancy rankings. However, the trend for most of the South paints a concerning picture of stalled progress and systemic inequality.
The researchers used a birth cohort approach, analyzing groups of individuals born in the same year across states. This method provides a more generational view than the commonly used "period life expectancy," which focuses on mortality trends within a single calendar year. According to Yale biostatistics researcher Theodore Holford, generational analysis gives better insight into the cumulative effect of societal and environmental factors on health.
Despite the rising national average, the lag in Southern states highlights deep-rooted issues. Experts point to socioeconomic differences, lack of access to healthcare, lower educational levels, and limited public health infrastructure as contributors to these disparities. Policies also play a major role. States that promote higher minimum wages, access to affordable medical care, and paid sick leave tend to have populations that live longer.
Health professionals like Dr. Marc Gourevitch from NYU emphasize that broader social policies can lead to meaningful improvements in public health. Helping people meet basic needs such as housing, nutrition, and healthcare access can significantly influence life expectancy over time. However, the impact of such policy changes often takes decades to become measurable.
Women in the District of Columbia now have the highest life expectancy in the U.S., reaching 93 years for those born in 2000—up from just 63.9 in 1900. Men in D.C. also experienced one of the largest increases, from 48.7 in 1900 to 86.5 in 2000. Urban areas like D.C. tend to benefit from better healthcare infrastructure, higher incomes, and greater access to medical resources compared to rural regions, which contributes to this disparity.
Outside of D.C., states with the highest life expectancies for women born in 2000 include New York (91.9), California (91.3), Massachusetts (88.8), and Hawaii (88.7). Men born in New York and California also showed among the largest improvements, now living into their mid-to-late 80s. Notably, the data reflects the state in which individuals died, not necessarily where they were born. This raises questions about migration patterns and how moving to a state with better healthcare and economic opportunities might impact one’s lifespan.
Ultimately, the study urges a renewed focus on improving public health through both medical advancement and progressive policy. The researchers are part of a broader initiative under the National Cancer Institute’s CISNET project, which seeks to use long-term data to guide policy decisions and close health gaps across the country. Although public health policy can take years or generations to show results, experts agree that these steps are crucial to ensuring that all Americans, regardless of where they live, have a fair shot at a longer, healthier life.
