I guessed who the richest celebrity was from Illinois and I got it completely wrong. I can give you two hints, but you'll probably only need one. He's afraid of snakes.
Where is the money in America? Apparently a lot of it is living near Lake Michigan in Illinois as one of those cities landed on the top 10 richest cities in America list.
If you want billionaires, you don't have to look outside Illinois' borders to find a bunch of them. 24/7 Wall Street says that Illinois is home to 17 billionaires, with 11 in Chicago and 2 in Highland Park.