North Dakota Army National Guard - Mandan Share: Government Offices North Dakota Army National Guard - Mandan Visit Website 503 E Main St #4 Mandan, ND 58554-3500 (701) 328-9636 663-9045 (fax) About Rep Info Map About Defenders of freedom. Over 4500 statewide and 1000 local members of the nations first line of defense both locally and abroad. Whom to Contact Raymond Dingeman What's Nearby? Distance: 5 10 15 20 25 50 mi.