Washington County Pennsylvania (Historic Districts) has 12 places on the National Register of Historic Places including 2 places of Statewide significance. Significant places include Cement City Historic District and Charleroi Historic District, Beallsville Historic District, Centerville Historic District and East Washington Historic District.
Some of the country's most noteable architects helped create the Washington County places including Robert L. Barnhart, Aberthaw Constuction, Lambie Concrete House Corporation, unknown, F.M. Hixon and C.M. Hall. Prominent architectural styles found in Washington Country are Greek Revival, Italianate and Queen Anne.