Washington County, Maryland Washington County, Maryland Washington County is located in the western part of the U.S. state of Maryland. As of the 2010 census, the population was 147,430. Its county seat is Hagerstown. Washington County was the first county in the United States to be named for the Revolutionary War general (and later President) George Washington. Washington County is one of three Maryland counties recognized by the Appalachian Regional Commission as being part of Appalachia. The county borders southern Pennsylvania to the north, Northern Virginia to the south, and the Eastern Panhandle of West Virginia to the south and west. Washington County
Streets and highways of Washington, D.C. frequently used to describe the inside lanes of 495—that is, those that travel clockwise around Washington. A convergence indexing based road traffic monitoring system was installed on Washington's highways in 2008. The Anacostia Freeway (DC-295) continues in a northeasterly direction from the point where I-295 ends at its intersection with I-695 near the 11th Street Bridges on the south side of the Anacostia River and links with the Baltimore–Washington Parkway, which eventually becomes Maryland Route 295, via a short section of Maryland Route 201. The Suitland Parkway connects the city with the southeastern suburbs in Prince George's County, Maryland. The