U S Government--post Office Washburn, ND 58577 Phone : (701) 462-3773 Business Category Post Offices Government Offices & Public Schools Post Office - Sta 1 Super Valu 105 Case St Washburn, ND 58577 Phone : (701) 462-3773 Business Category Post Offices Toll-Free           (800) ASK-USPS Post Office - Washburn 721 Main Ave Washburn, ND 58577 Phone : (701) 462-3773 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906