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National Average Prevalence

National Average
7.7%
Category
Health Outcomes
Counties Reporting
5,914

Prevalence Range

Lowest Prevalence
3.2%
Highest Prevalence
17.6%

Top 10 Highest-Prevalence Counties

Rank County State Prevalence
1 Hancock TN 17.6%
2 McDowell WV 16.5%
3 Calhoun WV 16.2%
4 Mingo WV 16.1%
5 Hickory MO 16.0%
6 Pickett TN 15.2%
7 Oglala Lakota SD 15.0%
8 Ozark MO 14.9%
9 Webster WV 14.8%
10 Tensas LA 14.6%

Top 10 Lowest-Prevalence Counties

Rank County State Prevalence
1 Los Alamos NM 3.2%
2 Falls Church VA 3.2%
3 Arlington VA 3.2%
4 Santa Clara CA 3.3%
5 King WA 3.3%
6 Somerset NJ 3.4%
7 Arlington VA 3.4%
8 King WA 3.4%
9 San Mateo CA 3.5%
10 Santa Clara CA 3.5%

Related Entities

Methodology

Data source: CDC PLACES County-Level Data (dataset ID: cdc-places). Vintage: 2026. Downloaded: 2026-04-13. Rows in source: 229,298.

CDC PLACES provides county-level prevalence estimates for chronic diseases, health behaviors, and preventive services from the Behavioral Risk Factor Surveillance System (BRFSS). Values represent model-based estimates of age-adjusted prevalence.

Full methodology →