Prevalence of Multiple Chronic Conditions Among US Adults, 2024.

<b>Objectives.</b> To provide current prevalence estimates for diagnosed multiple chronic conditions (MCC) among the noninstitutionalized, civilian US adult population. <b>Methods.</b> We analyzed data from the 2024 National Health Interview Survey (n = 32 629) to produce estimates and population counts for adults with 0, 1, or 2 or more conditions by demographic characteristics. <b>Results.</b> In 2024, 51.1% of US adults had at least 1 of 10 selected diagnosed chronic conditions, and 26.4% had MCC. Variations in the prevalence of MCC were observed by sex, race and Hispanic origin, age, health insurance coverage, and urbanization level. <b>Conclusions.</b> The National Health Interview Survey can be used to provide timely estimates on population prevalence of MCC. Prevalence of MCC in 2024 was similar to that of 2010 estimates, and subgroup differences have persisted. Results may inform public health efforts and guide prevention strategies aimed at addressing multiple chronic conditions among adults in the US population. (<i>Am J Public Health</i>. Published online ahead of print March 26, 2026:e1-e4. https://doi.org/10.2105/AJPH.2026.308427).