Four counties in northern Illinois are ranked among the healthiest 20 of the state's 102 counties.
That's according to a survey conducted by the Robert Wood Johnson Foundation. It allows you to measure health outcomes and factors in every U.S. county. It also lets you compare data from one county to another.
For example, if you wanted to know the number of primary care physicians per resident, there's an answer. By the way, the ratio for DeKalb County is 1 doctor per 2,910 residents. For Winnebago County it's 1 per 1,367 residents.