Washington County, Maryland is included in the Hagerstown-Martinsburg, MD-WV Metropolitan Statistical Area, which is also included in the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. The closes states to Washington County is west Virginia, Pennsylvania, Virginia, and Tennessee. The western portions of the Province of Maryland (including present Washington County) were incorporated into Prince George's County in 1696. This original county included six current counties. The first to be created was Frederick, separated from Prince George's County in 1748. Following independence, the sovereign State of Maryland formed Washington County on September 6, 1776, by the division of Frederick County. At the same time, a portion
Fort Washington, Maryland Fort Washington, Maryland Fort Washington is an unincorporated area and census-designated place in Prince George's County, Maryland. It borders the capital of the United States of America, Washington, D.C., situated just south of the downtown district. As of the 2010 census it had a population of 23,717. It is a prosperous community with an African American majority population. The Fort Washington community is located west of Maryland Route 210, with some additional area to the east of the highway. The community is named for Fort Washington, which upon its completion in 1809 was the only defensive fort protecting Washington, D.C.