Cavalier County North Dakota has 2 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include US Post Office--Langdon, Roxy Theatre, US Post Office--Langdon.
Some of the country's most noteable architects helped create the Cavalier County places including James A. Wetmore, John Marshall and Welworth Enterprises. Prominent architectural styles found in Cavalier Country are Early Commercial.