Allegany County Maryland (Vacant / Not In Use) has 6 places on the National Register of Historic Places including 1 place of Statewide significance. Significant places include Lonaconing Furnace, Chapel Hill Historic District, Decatur Heights Historic District, Folck's Mill and Klots Throwing Company Mill.
Some of the country's most noteable architects helped create the Allegany County places including J.N. Harris, T.W. Biddle, George Stansbury, Wright Butler and Lansing C. Holden. Prominent architectural styles found in Allegany Country are Federal, Greek Revival and Italianate.