Which peninsula includes Delaware and parts of Maryland and Virginia?

The Delmarva Peninsula includes Delaware and parts of Maryland and Virginia.

Its name is a clipped combination of Delaware, Maryland, and Virginia. The peninsula occupies most of Delaware plus Maryland’s Eastern Shore and Virginia’s Eastern Shore, making it a geographic region that crosses state boundaries rather than belonging to one state alone.

Delmarva is bordered by the Chesapeake Bay on the west and the Delaware River, Delaware Bay, and Atlantic Ocean on the east. The Chesapeake and Delaware Canal cuts across its northern isthmus, while the Chesapeake Bay Bridge and the Chesapeake Bay Bridge-Tunnel connect it with the mainland.

The peninsula is about 170 miles long and is largely part of the flat Atlantic Coastal Plain. Dover, Delaware, is its largest city by population, while Salisbury, Maryland, is a major population center farther south. A common mistake is to treat “Delmarva” as a state name; it is a regional name formed from three state names.