West Virginia is the fattest state in the United States, with 44.9% of adults classified as obese based on 2024 data. Mississippi is a close second at 44.4%. These are the only two states where obesity prevalence has crossed the 40% threshold.
The States With the Highest Obesity Rates
The CDC tracks adult obesity across all 50 states using self-reported height and weight data. In its most recent report using 2024 figures, four states stand well above the rest:
- West Virginia: 44.9% of adults
- Mississippi: 44.4% of adults
- Alabama: 41.8% of adults
- Oklahoma: 41.6% of adults
West Virginia and Mississippi have traded the top spot over the years, but both have consistently ranked at or near the top for more than a decade. What’s notable now is the sheer scale: nearly half of all adults in these states have a body mass index of 30 or higher, the standard threshold for obesity.
Why the South and Appalachia Lead
The states with the highest obesity rates cluster in two overlapping regions: the Deep South and Appalachia. That’s not a coincidence. These areas share a set of conditions that make maintaining a healthy weight harder at a population level.
Poverty is the biggest factor. West Virginia and Mississippi consistently rank among the poorest states in the country. Lower incomes limit access to fresh produce, gym memberships, and preventive healthcare. Many rural communities in these states lack full-service grocery stores entirely, leaving residents dependent on convenience stores and fast food. Physical activity is also lower in areas where jobs are sedentary or where infrastructure like sidewalks and parks is sparse.
Cultural food traditions play a role too. Southern and Appalachian diets lean heavily on fried foods, processed meats, and sweetened beverages. These are deeply rooted eating patterns, not simply matters of individual choice, and they’re reinforced by what’s available and affordable locally.
Racial and Ethnic Disparities Within States
Statewide averages can obscure significant differences between demographic groups. In Mississippi, 53.3% of Black adults are obese compared to 36.6% of white adults and 36.2% of Hispanic adults. That’s a gap of nearly 17 percentage points between Black and white residents in the same state.
Alabama shows a similar pattern, with 45.4% of Black adults and 38.4% of white adults classified as obese. In Oklahoma, the gap narrows: 43.8% of Black adults versus 41.6% of white adults. West Virginia is a different case. Its population is overwhelmingly white, and its overall rate of 44.9% is driven almost entirely by a white obesity rate of 44.5%.
These disparities reflect longstanding inequities in income, neighborhood resources, and access to healthcare rather than biological differences. Communities with less access to healthy food, safe spaces for exercise, and quality medical care consistently show higher rates of obesity regardless of geography.
The Financial Cost of High Obesity Rates
Obesity doesn’t just affect health. It drives up medical spending significantly. Nationally, adults with obesity spend roughly $2,500 more per year on medical care than adults at a normal weight, effectively doubling their healthcare costs. That figure, reported in 2017 dollars, is likely higher today.
The cost burden varies dramatically by state. In Texas, obesity increases an individual’s annual medical spending by about $1,880, a 105% jump. In New York, the increase is roughly $1,975, or 66% more. California sees the steepest dollar increase: adults with obesity spend $4,310 more per year than their normal-weight counterparts, a nearly threefold increase in medical costs.
For states like West Virginia and Mississippi, where obesity affects close to half the adult population, these per-person costs multiply into an enormous strain on state budgets, Medicaid systems, and employer-sponsored insurance plans. Higher rates of obesity-related conditions like type 2 diabetes, heart disease, and joint problems mean more emergency room visits, more prescriptions, and more lost workdays.
How Much the Numbers Have Changed
The current rates would have been almost unthinkable a generation ago. In 2004, no single state had an adult obesity rate above 30%. By 2013, most Southern states had crossed that line. Now two states are above 40%, and several others are closing in. The national trend has moved in one direction: up, and the states that started with the highest rates have generally climbed the fastest.
Colorado typically holds the lowest obesity rate in the country, hovering in the low 20s. The gap between the leanest and heaviest states is now more than 20 percentage points, a spread that reflects vastly different economic conditions, food environments, and public health investments across the country.