United States Government--post Offices, Apple River Freeport, IL 61032 Phone : (815) 594-2337 Business Category Post Offices Government Offices & Public Schools Post Office - Apple River 110 W Railroad St Apple River, IL 61001 Phone : (815) 594-2337 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (815) 594-2358