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Maryland Geography

The eastern half of Maryland is dominated by the Chesapeake Bay, and the surrounding estuaries and coastal plain. Numerous coves, creeks, salt marshes and small islands seem everywhere.

The Delmarva Peninsula occupies portions of three U.S. states: Delaware, Maryland, and Virginia. The peninsula is about 180 long, and nearly 71 miles wide. It's bordered by the Chesapeake Bay on the west, and the Delaware River, Delaware Bay, and Atlantic Ocean on the east. The peninsula's land is a mostly flat with a few low-lying hills.

Sandy beach fronts the Atlantic Ocean coastline along the edges of Assateague National Seashore

To the northwest of Annapolis, the fertile land rises into the hills of the Piedmont Plateau, then on into the northern reaches of the Blue Ridge Mountains.

In the panhandle area of the west, the Allegheny Mountains, a significant range of the Appalachian Mountains cross the state, continuing on into Pennsylvania. This heavily forested area is crisscrossed by deep river valleys. Maryland's highest point is located there; Backbone Mountain at 3,360 ft.

The most significant river is the Potomac, as it forms the entire southern border of the state. To the northeast, the Susquehanna River drains into the Chesapeake Bay, and central, the Patuxent River empties into the southern reaches of the Bay.

The (mostly manmade) Chesapeake & Delaware Canal runs 14 miles long, 450 feet wide and 35 feet deep across Maryland and Delaware, connecting the Delaware River with the Chesapeake Bay. It's a modern sea-level, electronically controlled commercial waterway, carrying 40 percent of all ship traffic in and out of the Port of Baltimore.

For a closer look at the topography of Maryland, view this topographic map

Maryland Photographs

potomac river

Potomac River

Maryland Cities, Counties & Area Codes

City County Area Code
Cumberland Allegany 301
Annapolis Anne Arundel 410
Parkville Baltimore 410
Baltimore Baltimore City 410
Lusby Calvert 410
Denton Caroline 410
Westminster Carroll 410
Elkton Cecil 410
Waldorf Charles 301
Cambridge Dorchester 410
Frederick Frederick 301
Oakland Garrett 301
Bel Air Harford 410
Columbia Howard 410
Chestertown Kent 410
Silver Spring Montgomery 301
Rockville Montgomery 301
Gaithersburg Montgomery 301
Hyattsville Prince Georges 301
Stevensville Queen Annes 410
Lexington Park Saint Marys 301
Princess Anne Somerset 410
Easton Talbot 410
Hagerstown Washington 301
Salisbury Wicomico 410
Berlin Worcester 410

About the Author

John Moen is a cartographer who along with his wife are the orignal founders of worldatlas.com. He and his wife, Chris Woolwine-Moen, produced thousands of award-winning maps that are used all over the world and content that aids students, teachers, travelers and parents with their geography and map questions. Today, it's one of the most popular educational sites on the web.

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This page was last updated on April 7, 2017.