Niobrara County Wyoming has 6 places on the National Register of Historic Places including 2 places of National significance and 3 places of Statewide significance. Significant places include Agate Basin Site, Cheyenne-Black Hills Stage Route and Rawhide Buttes and Running Water Stage Stations, DSD Bridge over Cheyenne River, Lusk Water Tower and Site of Ferdinand Branstetter Post No. 1, American Legion.
Prehistoric cultural affiliation(s) include Paleo-Indian dating back to 10999 BC.
Some of the country's most noteable architects helped create the Niobrara County places including Elkhorn & Missouri Valley Ra Fremont. Prominent architectural styles found in Niobrara Country are Bungalow/Craftsman and Early Commercial.