Number of adults aged 50 and older

In 2025, the number of adults aged 50 and older in the United States is expected to reach 124.4 million, an increase of 1.0% over the previous year. The demographic profile continues to be shaped by the aging of the Baby Boomer generation, who have significantly influenced population trends as they enter senior adulthood. This trend is accompanied by consistent gains in life expectancy due to advances in healthcare, nutrition, and safety standards. As a result, longevity remains a central driver of the elevated number of older adults in 2025.

Between 2020 and 2025, growth among adults aged 50 and older has moderated but remained positive, driven largely by continued medical and technological innovation that supports longevity. The population grew from 118.3 million in 2020 to 124.4 million in 2025, at an average annual rate of 1.0% per year. The effect of the Baby Boomer generation aging into this category has underpinned the persistence of a sizable population aged 50 and older, as this generation is the largest in US history. In addition to demographic momentum, ongoing improvements in healthcare, including preventive medicine and chronic disease management, have contributed to increasing longevity. Macro-level trends, such as improvements in workplace safety and the prevalence of healthier lifestyles, have further supported these gains, while nutritional advancements have played a role in prolonging the lives of this cohort. Throughout this five-year period, mortality rates for those under age 50 have also declined, resulting in a higher share of the total population transitioning into older age groups.

Overall, the period from 2020 to 2025 has featured moderate, steady increases in the population aged 50 and older, reflecting the continued influence of past demographic events, such as the post-war baby boom, as well as technological and medical advancements that have helped individuals live longer, healthier lives. This group is expected to remain an important and growing segment of the U.S. population through the current period.