Here is a great article from 2002 that has a list of Illinois bucks taken. The top archery typical buck was taken very very close to my house on a property next to where I hunted. If you look there are numerous counties producing 150" plus deer. The list includes those entered into the Illinois Big Buck Recognition Program. There are several bucks missing like the Damery buck from Macon county, Mel Johnson and Jerry Bryant bucks from Peoria County.

http://www.lib.niu.edu/2002/oi020305.html