Post Office - Oriska 311 5th St Oriska, ND 58063 Phone : (701) 845-2404 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906 United States Government--postal Service, Post Office, Oriska Oriska, ND 58063 Phone : (701) 845-2404 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools