<P> The Washington metropolitan area is the metropolitan area centered on Washington , D.C. , the capital of the United States . The area includes all of the federal district and parts of the U.S. states of Maryland and Virginia , along with a small portion of West Virginia . While not a part of the Washington metropolitan area , St. Mary 's County is part of the Baltimore -- Washington metropolitan area . </P>
what part of maryland is close to washington dc
Washington metropolitan area