middle atlantic states State of Maryland A state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia and the District of Columbia to the south and west, Pennsylvania to the north, and Delaware to the east. LanguaL curation note: US FDA 1995 Code: US24 maryland State of Maryland A state located in the Mid Atlantic region of the United States, bordering Virginia, West Virginia and the District of Columbia to the south and west, Pennsylvania to the north, and Delaware to the east. LanguaL curation note: US FDA 1995 Code: US24 maryland