Actually it's not really in Chicago. In a suburb North-West of Chicago called Rosemont. 5555 N. River Road, Rosemont, Illinois, 60018
Really large show. Now $6 to get in but supposed to be for all days. Not sure but usually the first day is special and cost extra. I haven't seen to many things about this one and usually I get flyers for all coin shows in Illinois.
If your comoing here by auto, you'll find there is no place to park free around that place so be prepared to pay about $11 to park, per day accross the street from the show.
I usually try to avoid this show but always end up going at least one day and give my entrance ticket to someone just coming in since I know I won't be back for more.
There is another coin show the preceeding Sunday in Countryside, Illinois and one on the following Sunday in Itasca. Both are also in Chicago Suburbs.