<P> Oxon Hill includes many garden apartment and townhouse communities along with single - family detached homes built mostly between the 1940s when suburban development began, through the early 1990s (except for the newer National Harbor condominiums), including the incorporated town Forest Heights . In earlier decades, many residents were scientists from the adjacent U.S. Naval Research Laboratory, Air Force personnel, or musicians in military bands, but very few are now, as today such professionals prefer newer and more upscale communities . Oxon Hill's two principal shopping centers ("Rivertowne", built about 1985 which includes a K - Mart, Safeway, Staples, Ross Stores Inc. and Home Depot, and "Eastover", built about 1955) attract neighborhood customers as well as shoppers from nearby Southeast Washington, D.C. Eastover, located at the D.C. / state line, is a hub of many bus routes, some of them operating 24 hours a day, and has a Prince George's County Police station . The apartment communities closest to the D.C. line are informally called by their original name "Glassmanor", although rental companies have officially given them newer names . Rather unusual community features of Oxon Hill are a nursing home and a large cultural center, both operated for an ethnic Filipino population who are numerous in Oxon Hill and Fort Washington . A Walmart was scheduled to open in 2014 but has since been delayed for site layout revisions . </P> <P> Until about 1960, the community used the mailing address Washington, D.C., before getting its own postal designation . About 1980, the United States Postal Service detached the two - thirds of greater Oxon Hill that was furthest from Washington, D.C. and re-defined that part as a new postal designation, Fort Washington, MD . To make mail sorting easier at that time, the new postal boundary line separating the two Maryland communities was drawn along already existing zip code boundaries . (The former zip 20021 portion of Oxon Hill remained Oxon Hill with the new code 20745, while everything in the former zip 20022 portion of Oxon Hill about 1980 was automatically renamed the new Fort Washington 20744 .) Illogically, this partitioning reassigned some areas that seem to be almost in the heart of Oxon Hill (such as all of the Bock Road, Tucker Road, Murray Hills, and Brinkley Road areas, including several large prominent churches, Rosecroft Raceway, the ice rink, and ironically even Oxon Hill Middle School) to Fort Washington mailing addresses, which can cause confusion . </P> <P> Oxon Hill is located in Prince George's County, Maryland along Maryland Route 210 (Indian Head Highway) and Maryland Route 414 (Oxon Hill Road), less than 2 miles (3 km) south of the boundary of Washington, D.C. The CDP lies directly south of the Capital Beltway (I - 495 / I - 95) just east of the Woodrow Wilson Bridge over the Potomac River . </P> <P> According to the U.S. Census Bureau, the total area of Oxon Hill is 6.6 square miles (17.2 km), of which 6.6 square miles (17.1 km) is land and 0.01 square miles (0.03 km), or 0.20%, is water . </P>

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