I apologize for the delay in responding to your inquiry - I was away on vacation, but will respond now. The first cemetery that you noted behind the OH post office is the cemetery of the Oxon Hill Methodist Episcopal Church, which stood on this site from the time of its construction in 1811. This original church was replaced by a larger wood frame church building circa 1899, on the same property, but closer to the road. this church burned to the ground in 1951, and a new church was soon built a short distance to the south at the intersection of Bock and Livingston Roads. There are at least 30 inscribed gravestones in the cemetery, dating from 1878 to 1953, and probably many more vurials without surviving stones. Though still owned by the church, the cemetery is no longer in use.
The second cemetery that you have inquired about is the Addison family cemetery at Oxon Hill Manor. This is the property of the original Oxon Hill Manor, the plantation house built for membersof the Addison family in the 18th century. This large brick house was destroyed by fire in 1895, and the present Oxon Hill Manor (now owned and operated by the Maryland-National Capital Park and Planning Commission, was built on land to the south in 1929. A considerable amount of archaeological work was done on the Oxon Hill Manor property before development of National Harbor began, and now the only above-ground reminder of the original historic property is the Addison cemetery. There are six inscribed stones for members of the Addison family, in poor condition, and certainly more burials the markers of which have not survived. The cemetery will be cleaned up and preserved as required in the development plans for National Harbor.

Thanks for your inquiry. I hope that this information is helpful.

Susan G. Pearl, Historian
Prince George's County Historical Society

--Previous Message--
: Greetings:
:
: There two cemeteries in Oxon Hill that have
: caught my eye. Would PGCHS be as so kind to
: reply with the cemetery names? The first
: one is located behind the Oxon Hill Post
: Office building on Oxon Hill Rd and the
: other one is the cemetery on the hill as you
: go into National Harbor off of Oxon Hill
: Road. Any assistance would be appreciated.
:
: Thanks
:
: Bryan Green
: