Allegany County Maryland (Historic Districts) has 12 places on the National Register of Historic Places including 2 places of National significance and 2 places of Statewide significance. Significant places include Chesapeake and Ohio Canal National Historical Park, Inns on the National Road, Breakneck Road Historic District and Washington Street Historic District and Chapel Hill Historic District.
Some of the country's most noteable architects helped create the Allegany County places including Benjamin Wright, John Notman, Harvey Wilson, Wright Butler, T.W. Biddle, George Stansbury and Ralph Rizer. Prominent architectural styles found in Allegany Country are Greek Revival, Late Victorian and Federal.