Billings County North Dakota (Historic Districts) has 2 places on the National Register of Historic Places including 2 places of National significance and 1 place of Statewide significance. Significant places include Custer Military Trail Historic Archeological District, Theodore Roosevelt National Memorial Park and Custer Military Trail Historic Archeological District.
Several famous people are associated with these Billings County historic places including George Armstrong Custer and Theodore Roosevelt. Prominent architectural styles found in Billings Country are .