Dewey County South Dakota has 5 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Molstad Village and Laurens Polygonal Hog House, Dakota Club Library, Drees Brothers General Mechandise and Forest City Bridge.
Prehistoric cultural affiliation(s) include Arikara dating back to 1500.
Some of the country's most noteable architects helped create the Dewey County places including August and Frank Sr. Laurenz, WPA and Bridge Div. SD Dept. of Highways. Prominent architectural styles found in Dewey Country are .