Alexandria County Virginia (Historic Districts) has 5 places on the National Register of Historic Places including 1 place of National significance and 1 place of Statewide significance. Significant places include Alexandria Historic District and Rosemont Historic District, Parkfairfax Historic District, Rosemont Historic District and Town of Potomac.
Some of the country's most noteable architects helped create the Alexandria County places including Leonard and Associates Schultz, Clarke, G.D., and Rapuano, Michael and Banks & Lee Inc.. Prominent architectural styles found in Alexandria Country are Colonial Revival, Bungalow/Craftsman and Queen Anne.