Maryland is a state in the Northern,Mid-Atlantic or South region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, Delaware and the Atlantic Ocean to its east, and the national capital and federal district of Washington, D.C. to the southwest. With a total area of 12,407 square miles, Maryland is t…Maryland is a state in the Northern,Mid-Atlantic or South region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, Delaware and the Atlantic Ocean to its east, and the national capital and federal district of Washington, D.C. to the southwest. With a total area of 12,407 square miles, Maryland is the ninth-smallest state by land area, and its population of 6,177,224 ranks it the 18th-most populous state and the fifth-most densely populated. Maryland's capital city is Annapolis, and the most populous city is Baltimore.