Fort Washington is an unincorporated area and census-designated place in Prince George's County, Maryland, United States.

[4] The Fort Washington community is located west of Maryland Route 210, with some additional area to the east of the highway.

The failure of that fort to stop a British fleet from invading the national capital during the War of 1812 led to the construction of the current, larger, stone fortification.

[6] During World War II, the US Army's Adjutant General's School was located at the fort, and had billeting for 362 officers and 2,526 enlisted persons.

[8] Upon the outbreak of the American Civil War, fearing for the safety of Washington in case of attack, Secretary of the Navy Isaac Toucey ordered a detachment of US Marines to garrison the fort.

In May 1865 Secretary of the Navy Gideon Welles ordered the Potomac Flotilla reduced to half strength due to cessation of hostilities.

In 1980, the postal service split the Fort Washington area from Oxon Hill, defining it as a separate town name.

Eventually, all roads intersecting Route 210 in the Fort Washington area (from the Beltway as far south as the Highway 210 curve at Piscataway Creek) will be upgraded to controlled-access interchanges (eliminating all traffic signals) gradually during the 2020s.

[7] The Maryland-National Capital Park and Planning Commission (M-NCPPC) maintains the Harmony Hall Regional Center [1], including the John Addison Concert Hall, site of community theater ("Tantallon Community Players"), art shows, frequent concerts, and a variety of classes for all ages.

Prince George's County Police Department District 7 Station in Fort Washington CDP serves the community.