
Of the 102 counties in Illinois, Whiteside County ranks 28th, followed by Henry County at number 30, Mercer is 31, Rock Island ranks 42nd, and Knox is number 67.
Of Iowa's 99 counties, Dubuque is number 18, followed by Jackson at number 43, Scott at 53, Muscatine at 68, and Clinton County ranks 89th in the state.
The study ranks DuPage County as the healthiest in Illinois, closely followed by some other suburban Chicago counties, and coming in last is Alexander County in far, southern Illinois.
Iowa's healthiest county is Dallas, in the Des Moines metro area, with Montgomery being the least healthy in the state - it's located in southwest Iowa near Council Bluffs.