The Probation Office for the Northern District of Illinois serves 35 U.S. District Judges and 14 Magistrate Judges and covers 18 counties in northern Illinois. Our office is comprised of 100+ employees. The Probation Office headquarters is located at 230 S. Dearborn Street, Suite 3400, Chicago, Illinois 60604. There are two divisional offices (Eastern, located in Chicago, IL and Western, located in Rockford, IL) and one satellite office (located in Lisle, Illinois).