Railway Credit Union - Bismarck Share: Credit Unions Railway Credit Union - Bismarck Visit Website Request Info 112 S 24th Street Bismarck, ND 58501 (701) 222-8736 1-800-601-9580 (701) 222-8777 (fax) About Map About Full service credit union with offices in Bismarck and Mandan. What's Nearby? Distance: 5 10 15 20 25 50 mi.