Henry County Indiana (Historic Districts) has 3 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Knightstown Historic District, Middletown Commercial Historic District, New Castle Commercial Historic District.
Some of the country's most noteable architects helped create the Henry County places including Charles H. Byfield, Isaac Hodgson, Henry Brown and O.L. Miller. Prominent architectural styles found in Henry Country are Classical Revival, Italianate and Gothic Revival.