North Dakota Farmers Union Insurance Share: Insurance North Dakota Farmers Union Insurance Visit Website 3801 Memorial Hwy, Ste C Mandan, ND 58554 (701) 663-3419 1-800-366-8331 (701) 751-4438 (fax) About Map About Insurance and Financial Services. What's Nearby? Distance: 5 10 15 20 25 50 mi.