Us Government--postal Service, Lindenwood Monroe Center, IL 61052 Phone : (815) 393-4839 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Lindenwood 104 S Walnut St Lindenwood, IL 61049 Phone : (815) 393-4839 Post Office - Lindenwood Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (815) 393-4903