Response to your recent edit at Loyola Academy
Having attended Loyola Academy, I think it's fair to say that the students come from Chicagoland. "Northern Illinois" is definitely misleading, as it suggests that students are commuting from places like Rockford and the Quad Cities.  They're not. (It's not a boarding school, or anything like that.) To my knowledge, there weren't even any kids from Naperville or Aurora. Chicagoland is sufficiently broad enough.