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Explore national- and state-level data for hundreds of health, environmental and socioeconomic measures, including background information about each measure. Use features on this page to find measures; view subpopulations, trends and rankings; and download and share content.
United States Value:
Percentage of the population that is ages 18-64
Percentage of the population ages 18-64 that is non-Hispanic multiracial
1.0% - 1.6%
1.7% - 1.7%
1.8% - 2.0%
2.1% - 2.4%
2.5% - 19.4%
US Value: 60.5%
Top State(s): South Dakota: 57.3%
Bottom State(s): Colorado: 63.3%
Definition: Percentage of the population that is ages 18-64
Data Source and Years(s): U.S. Census Bureau, Single-Race Population Estimates via CDC WONDER Online Database, 2024
Suggested Citation: America's Health Rankings analysis of U.S. Census Bureau, Single-Race Population Estimates via CDC WONDER Online Database, United Health Foundation, AmericasHealthRankings.org, accessed 2026.
The demographics of a state influence the health needs and outcomes of the population. Understanding its demographic breakdown can help state health officials determine priorities for health promotion and disease prevention. In 2023, people between the ages of 18 and 64 accounted for approximately 78% of the adult population of the United States. This population is commonly referred to as working-age adults, as most in this age range are part of the workforce. This population is often used as an economic measure to indicate the total number of workers available in an economy.
Many working-age adults have chronic health conditions. About a quarter of adults ages 18-44 have one or more chronic conditions and nearly two-thirds of adults ages 45-64 have one or more. The most expensive health conditions for this age group are cancer, heart conditions, arthritis, other non-traumatic joint disorders, trauma-related disorders and mental disorders.
Boersma, Peter, Lindsey I. Black, and Brian W. Ward. “Prevalence of Multiple Chronic Conditions Among US Adults, 2018.” Preventing Chronic Disease 17 (September 17, 2020): 200130. https://doi.org/10.5888/pcd17.200130.
Soni, Anita. “Top Five Most Costly Conditions among Adults Age 18 and Older, 2012: Estimates for the U.S. Civilian Noninstitutionalized Population.” Statistical Brief #471. Medical Expenditure Panel Survey. Rockville, MD: Agency for Healthcare Research and Quality, April 2015. http://www.ncbi.nlm.nih.gov/books/NBK447186/.
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