Depends on where the border between the People's Republik of Ill-Annoys and the free state of Wisconsin actually lies.
This morning, I had to run to the hardware store for some stuff. I was a bit early, so took a drive around the south side of Beloit. Shirland Avenue runs down the state line - the south side is PRI, South Beloit.
I went west down Shirland for a ways, then made a U-turn and went back east.
Possessing a loaded gun in the PRI off your own property is a felony, unless you are a Chicago alderman, police officer, or a "deputy", which I understand is anyone who wants to be who has political connections.