If you're worried about the high cost of health care, both now and as you age, you might want to give some thought to where you live as an influence on your health. To point you in the right direction, WalletHub has put together a list of the healthiest and unhealthiest cities in the U.S.

"There is an increasing appreciation for the fact that many of our health outcomes are determined long before we enter the health care system: social determinants and health behaviors are major drivers of chronic illness," says Katherine Baicker, professor of health economics at Harvard School of Public Health.

Lest you think it's only a matter of how many hospitals and doctors a place has, and how close they are to where you live, you're overlooking a number of other factors—such as access to nutritious food, the degree of air pollution, how many recreation facilities are available (and how good they are) and how affordable health care is.