Understanding County Health Rankings: What the Data Reveals

Health outcomes vary dramatically from one county to the next. Life expectancy can differ by more than 20 years between the healthiest and least healthy counties in the United States. We analyzed CDC County Health Rankings data for over 3,100 counties to identify the 25 healthiest places in America and understand what sets them apart.

The top-ranked county is Los Alamos County, New Mexico, with a health score of 99.6. The top 25 counties average a life expectancy of 81.8 years, compared to the national average of approximately 77.5 years. Here is what the data reveals about health in America.

The 25 Healthiest Counties in America (2026)

These counties earn the highest health scores in our ranking system, which uses percentile-rank methodology across CDC health metrics. A score of 90 means the county is healthier than 90% of all US counties.

Geographic Patterns in County Health

The healthiest counties cluster in specific regions. Massachusetts (4 counties), Minnesota (4 counties), Colorado (2 counties), Iowa (2 counties), Rhode Island (2 counties) contribute the most counties to the top 25.

Colorado, Minnesota, and Hawaii consistently appear near the top. These states share several characteristics: strong public health infrastructure, high rates of physical activity, and relatively low obesity rates. Mountain West counties benefit from active outdoor lifestyles and lower pollution levels.

The pattern is inverted in parts of the Deep South and Appalachia, where counties face higher rates of chronic disease, fewer healthcare providers per capita, and lower insurance coverage rates.

What Drives County Health Outcomes?

The data reveals several consistent factors that separate the healthiest counties from the rest:

• Insurance coverage: The top 25 counties have uninsured rates well below the national average of 9%. Access to insurance is the single strongest predictor of regular preventive care.
• Primary care access: Counties with more primary care physicians per capita consistently achieve better health outcomes. Preventive care catches problems early.
• Income and education: Higher median incomes and education levels correlate strongly with better health outcomes. Wealthier counties have better access to healthy food, fitness facilities, and healthcare.
• Mental health resources: Counties with adequate mental health provider ratios see lower rates of substance abuse, suicide, and related health crises.
• Physical environment: Counties with clean air, access to outdoor recreation, and lower pollution levels report fewer respiratory illnesses and chronic conditions.

The Health Gap: Healthiest vs. Least Healthy Counties

The disparity between the healthiest and least healthy counties is stark. While the top counties report life expectancies above 80 years, the bottom counties report life expectancies below 70 — a gap of more than a decade.

Counties like Kenedy County, Texas (health score: 0) face compounding challenges: high uninsured rates, physician shortages, elevated chronic disease rates, and limited access to mental health care. These are not random outcomes — they reflect decades of underinvestment in public health infrastructure.

This disparity underscores why county-level health data matters. State averages mask enormous variation. Two counties in the same state can have health outcomes as different as two different countries.

Healthcare Access: The Provider Gap

Access to healthcare providers varies enormously across counties. The healthiest counties typically have 80 or more primary care physicians per 100,000 residents. Many of the least healthy counties have fewer than 30 — or none at all.

Mental health provider access follows a similar pattern. Urban and suburban counties in the top 25 have hundreds of mental health providers per 100,000 residents, while rural counties at the bottom of the rankings may have fewer than 50. This shortage has cascading effects on substance abuse treatment, crisis intervention, and overall community well-being.

Methodology

Health scores are calculated using CDC County Health Rankings data (2024 release), which compiles data from multiple federal sources. Key metrics include life expectancy, premature death rate, percentage of adults reporting poor or fair health, uninsured rate, primary care physician ratio, and mental health provider ratio. Scores use percentile-rank methodology on a 0-100 scale where 100 is healthiest. Counties with insufficient data may not receive a health score.