Madison County is the healthiest in Idaho, and Benewah County is the least healthy, according to rankings released Wednesday.
Visit www.countyhealthrankings.org to view the full national rankings by the Robert Wood Johnson Foundation and the University of Wisconsin Population Health Institute.
Ada and Boise counties may be neighbors, but there is a wide gap in their health and in how easy it is for residents to get health care, the study found.
• Ada County ranked 8th statewide for lifespan, while Boise County ranked 39th.
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• Ada County residents were more active and had fewer drunk-driving deaths.
• There is one primary-care physician for every 1,193 people in Ada County, compared with one per 3,418 residents in Boise County.
• Finding a mental health provider is almost 20 times easier in Ada County than in Boise County.
But it's not all black-and-white. Ada County also has more sexually transmitted infections per capita and a higher rate of violent crime and teen births.
Click here to see how Treasure Valley counties stack up.
The ranking’s authors said the healthiest counties in each state have higher quality of life indicators, such as higher college attendance, better access to parks and gyms. The least healthy counties have more smokers, teen births and alcohol-related fatal car crashes.
The study looked at 30 factors that influence health, such as education, housing, violent crime, jobs, diet and exercise.