In Urbana and Champaign, bikes can be parked at bike racks, near the edge of wide sidewalks (e.g., downtown), or anywhere a car can park for free (i.e., not in metered or permit parking spaces. When parking on a sidewalk, make sure to leave space so people who are walking or are in wheelchairs can still get by.
On the University of Illinois campus, bikes must be parked at or near bike racks.