A new SmartAsset study ranked the 10 wealthiest counties in Illinois based on income, home values, and investment income.

RECOMMENDED: These three Chicago suburbs are among the wealthiest in America To catch you up: the global ranking is "the definitive guide to city wealth," published annually by Henley & Partners ...

Move over New York, Los Angeles, Chicago and Miami ... Too Which suburbs are home to some of the wealthiest Americans? To find out, GOBankingRates looked at all cities with 5,000 or more ...