Post Office - Gardner 409 Front St Gardner, ND 58036 Phone : (701) 484-5371 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906 United States Government--postal Service, Gardner Nd Gardner, ND 58036 Phone : (701) 484-5371 Business Category Government Offices-Federal Government Offices & Public Schools United States Government--postal Service Gardner, ND 58036 Phone : (701) 484-5371 United States Government--postal Service Business Category Government Offices-Federal Government Offices & Public Schools