Downtown Bismarck Apartments For Rent . See all 23 3 bedroom apartments in downtown bismarck, bismarck, nd currently available for rent. 2 bed 1.0 bath 900 sqft. Downtown Bismarck Apartment 415 N Mandan St Aspen Group from www.aspengrouprealestate.com Visit rent.com® to find your next apartment now! Market summary for downtown bismarck, bismarck, nd Find apartments in bismarck's most walkable neighborhoods: