Oxon Hill is an unincorporated area and census-designated place (CDP) in southern Prince George's County, Maryland, United States. Oxon Hill is a suburb of Washington, located southeast of the downtown district and east of Alexandria, Virginia. It contains the new 300-acre (120 ha) National Harbor development on the shore of the Potomac River.
For the 1990 and 2000 censuses, the United States Census Bureau defined a census-designated place consisting of Oxon Hill and the adjacent community of Glassmanor, designated Oxon Hill-Glassmanor, for statistical purposes. As of the 2010 census, Oxon Hill was delineated separately and had a population of 17,722.
Oxon Hill was named for the colonial 18th century manor home of Thomas Addison (which burned in 1895 but was replaced in 1929 by a large 49-room neo-Georgian-style home called Oxon Hill Manor, standing on a bluff over the Potomac River). The current Manor is now owned by the Maryland-National Capital Park and Planning Commission and is used for cultural activities, as well as being rented for weddings and special events. "Oxon" is an abbreviation for the Latin Oxoniensis, meaning "of Oxford." The area now known as Oxon Hill reminded Addison of the area near Oxford, England. The Revolutionary patriot John Hanson died while visiting the first Manor, and may be buried there in an unmarked grave.
Oxon Hill Manor, the Butler House, Oxon Cove Park, and St. Ignatius Church are listed on the National Register of Historic Places.
Today the community is bisected by the busy Capital Beltway (I-95/495), and is near the interstate Woodrow Wilson Bridge.