Merrill Ia--united States Government Post Office, For Zip Code Information Merrill, IA 51038 Phone : (712) 938-2325 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Merrill School--post Office, Zip Code Information Merrill, IA 51038 Phone : (712) 938-2325 Business Category Government Offices-City Village & Twp Post Offices Government Offices State & Local Government Offices & Public Schools Post Office - Merrill 134 Main St Merrill, IA 51038 Phone : (712) 938-2325 Business Category Government Offices-City Village & Twp Post Offices Government Offices State & Local Government Offices & Public Schools Toll-Free           (800) ASK-USPS Merrill Ia--united States Government Post Office 134 Main St Merrill, IA 51038 Phone : (712) 938-2325 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools