Post Office - Kathryn 307 1st Ave Kathryn, ND 58049 Phone : (701) 796-8401 Business Category Post Offices Toll-Free           (800) ASK-USPS Fax           (605) 357-4906 United States Government--postal Service, Post Offices, Kathryn 307 1st Ave Kathryn, ND 58049 Phone : (701) 796-8401 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools