Hancock County Iowa (Historic Districts) has 2 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Pilot Knob State Park, Trail Area (Area 6a--6c) and Pilot Knob State Park: Portals in Area 5b, Pilot Knob State Park, Trail Area (Area 6a--6c), Pilot Knob State Park: Portals in Area 5b.
Some of the country's most noteable architects helped create the Hancock County places including Ames Central Design Office. Prominent architectural styles found in Hancock Country are .