These are all the haunted houses in IL.
http://www.hauntedillinois.com/eventlisting.phpGo to (once on that link)
Click here to see more Haunted Houses and Halloween Events... (towards the middle of the page),
and than you will get to see all of them.
Than at the top of that page, find in a red box Search by: "Event Type." Than, put Haunted Houses out of the things that come up.
The 3 haunted houses I know (besides Great America) are St. Charles Jaycees Haunted House
http://www.stcharlesjaycees.org/hh05%20flyer.htm (I've never been it, but I see it around.), Sony Acres barn in West Chicago, IL (This one I have been in, and it's a bunch of cages, and props. There are some scary people though.), and Haunted Trails in Burbank, IL has one. I haven't been in that one.
I'm not a Haunted House type of person. I'm a looking at Halloween props type of person, but yet the goal of a Haunted House is for the people to not stay long enough and look at the props. Move people through, bring more people in. yada yada. I would be interested in a haunted house like Universal has had though (Friday the 13th, Chucky, Saw, and A Nightmare on Elm Street) because that stuff you just don't see anywhere else.
"I've been staring at the world, waiting. All the trouble and all the pain we're facing. Too much light to be livin' in the dark. Why waste time? We only got one life. Together we can be the CHANGE. So go and let your heart burn bright"