Below is the info relating to crossbows in Illinois.
A legally permitted archery hunter may use a crossbow from the second Monday following Thanksgiving through the end of the archery hunting seasons. Illinois law continues to allow use of a crossbow throughout the entire archery season by persons age 62 or older and handicapped persons who are issued crossbow permits by the IDNR.
Wyoming, Wyoming, then Wyoming. 100 deer a day seen and a 95% shot at a P&Y deer! Hunted out there 3 times for whitetail after going to Illinois. If you want the BEST BANG for your buck the West is where its at!!