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
Maryland State House New York). From November 26, 1783 to August 13, 1784, Annapolis was the capital of the United States. The Congress of the Confederation met in the Maryland State House. Subsequently, Annapolis was a candidate to become the new permanent national capital before Washington, D.C. was built. It was in the Old Senate Chamber that Congress ratified the Treaty of Paris on January 14, 1784, formally ending the American Revolutionary War. The United States District Court for the District of Maryland met there for the first decade of its existence. In 1800, judge Samuel Chase tried a local postmaster for embezzlement