The Delmarva Peninsula, or simply Delmarva, is a large peninsula on the East Coast of the United States, occupied by the vast majority of the state of Delaware and parts of the Eastern Shore of Maryland and Eastern Shore of Virginia. The peninsula is 170 miles long. In width, it ranges from 70 miles near its center, to 12 miles at the isthmus on its northern edge, to less near its southern tip of Cape Charles.