Oxon Hill, village (1990 pop. 35,794), Prince Georges co., central Md., a suburb S of Washington, D.C. Oxon Hill was dominated by large estates until the 1950s. National Harbor, a major mixed-use development there that includes a convention center and resort, is centered on a dredged cove on the Potomac. Sights include Oxon Hill Farm, run by the National Park Service as a 19th-century farm, and Fort Foote Park, with cannons, gun emplacements, and reinforced earthworks from a fort built during the Civil War to protect the capital.
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