Marengo County Alabama (Historic Districts) has 8 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Demopolis Historic Business District and Jefferson Historic District, Allen Grove, Cedar Grove Plantation and Cuba Plantation.
Some of the country's most noteable architects helped create the Marengo County places including David Rudisill. Prominent architectural styles found in Marengo Country are Greek Revival, Colonial Revival and Queen Anne.