Eddy County North Dakota has 5 places on the National Register of Historic Places including 4 places of Statewide significance. Significant places include Eddy County Courthouse, Marriage, Sylvanus, Octagonal Barn, New Rockford Bridge and US Post Office--New Rockford and Eddy County Courthouse.
Some of the country's most noteable architects helped create the Eddy County places including Louis A. Simon, M.E. Beebe, M.J. Moran and Fargo Bridge & Iron Co.. Prominent architectural styles found in Eddy Country are .