U S Government--koeltztown Argyle, MO 65001 Phone : (573) 728-6221 Business Category Government Offices & Public Schools U S Government--post Office Koeltztown Koeltztown, MO 65048 Phone : (573) 728-6221 Business Category Post Offices Government Offices & Public Schools United States Government--post Offices, Koeltztown Argyle, MO 65001 Phone : (573) 728-6221 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Koeltztown 3937 Highway T Koeltztown, MO 65048 Phone : (573) 728-6221 Post Office - Koeltztown Business Category Post Offices Toll-Free           (800) ASK-USPS