Find Your Court | State of Illinois Office of the Illinois Courts Search Search Court Select Court Supreme Appellate Circuit Filter by Content of Interest Select Content of Interest Court Disability Coordinator Electronic Device Policy Local Rules / Orders Remote Proceedings Boone County Courthouse Address 601 North Main StreetBelvidere , IL 61008 (815) 544-0371 Visit Website Learn More Winnebago County Courthouse Address 400 West State StreetRockford, IL 61101 (815) 319-4806 Visit Website Learn More Winnebago County Criminal Justice Center Address 650 West State StreetRockford, IL 61102 (815) 319-4806 Visit Website Learn More Winnebago County Juvenile Justice Center Address 211 South Court StreetRockford, IL 61101 (815) 319-4806 Visit Website Learn More