Post Office - Grandin 301 3rd St Grandin, ND 58038 Phone : (701) 484-5229 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906 United States Government--postal Service Grandin, ND 58038 Phone : (701) 484-5229 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--postal Service, Grandin Nd Gardner, ND 58036 Phone : (701) 484-5229 Business Category Government Offices-Federal Government Offices & Public Schools