Audubon County Iowa (Historic Districts) has 4 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Poplar Rural District and Poplar Rural District, Kimballton Commercial District, Kimballton West 2nd--West 3rd Street Residential District and Poplar Rural District.
Some of the country's most noteable architects helped create the Audubon County places including Hans P. Boldt and T. G. Jensen. Prominent architectural styles found in Audubon Country are Queen Anne, Gothic and Italianate.