The County Health Rankings & Roadmaps (CHRR) program synthesizes health information from a variety of national data sources. Most of the data are publically available at no charge. Measures based on vital statistics data, sexually transmitted disease rates, and Behavioral Risk Factor Surveillance System (BRFSS) survey data were calculated by staff at the National Center for Health Statistics and other units of the Centers for Disease Control and Prevention (CDC). Health care quality measures were calculated by the authors of the Dartmouth Atlas of Healthcare, using Medicare claims data.

Data sources used to compile provided data are following:

1. Behavioral Risk Factor Surveillance System (BRFSS)
2. The Dartmouth Institute
3. American Community Survey, 5-year estimates
4. CDC Diabetes Interactive Atlas
5. CDC WONDER
6. Comprehensive Housing Affordability Strategy (CHAS) data
7. County Business Patterns
8. CMS, National Provider Identification (NPI)
9. Fatality Analysis Reporting System (FARS)
10. Federal Bureau of Investigation, Uniform Crime Reporting
11. Health Resources and Services Administration, Area Health Resource File
12. Map the Meal Gap
13. National Center for Health Statistics (NCHS)
14. National Center for HIV/AIDS, Viral Hepatitis, STD, and TB Prevention
15. Safe Drinking Water Information System
16. US Census, Small Area Health Insurance Estimates
17. US Census, Small Area Income and Poverty Estimates
18. US Department of Agriculture, Food Environment Atlas
19. U.S. Department of Education (EDFacts)