United States Government--for Zip Code Information Call Schaller, IA 51053 Phone : (712) 275-4531 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Schaller 205 S Main St Schaller, IA 51053 Phone : (712) 275-4531 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Office 205 S Main Schaller, IA 51053 Phone : (712) 275-4531 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools