Delta Dental of Minnesota Share: Dentistry Delta Dental of Minnesota Visit Website 500 Washington Ave. South, Suite 2060 Minneapolis, MN 55415 About Map About Delta Dental of Minnesota is one of the largest providers of dental benefits in the Upper Midwest, serving North Dakota and Minnesota. We are an independent and nonprofit dental insurance corporation. What's Nearby? Distance: 5 10 15 20 25 50 mi.