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The Geography of Maryland
Longitude / Latitude

Longitude: 75° .03'W to 79° 29'W
Latitude: 37° 53'N to 39° 43'N

Length x Width

Maryland is about 250 miles long and 100 miles wide.

Geographic Center

The geographic center of Maryland is located in Prince Georges County, 4.5 miles NW of Davidsonville.
Longitude: 77° 22.3'W Latitude: 39° 26.5'N

Chesapeake Bay

Maryland is bordered by the Chesapeake Bay.  The Chesapeake Bay is 195 miles long and has coast lines in both Maryland and Virginia.  Its width varies from 3 to 20 miles.  It is approximately 1,726 square miles.


Maryland is bordered by the Chesapeake Bay, by Pennsylvania on the north, and a small piece of Virginia on the south. On the east, Maryland is bordered by the Atlantic Ocean and Delaware. West Virginia and Virginia border Maryland on the west.  The mid portion of the state is interrupted by Washington, D.C, which was originally part of Montgomery and Prince George's Counties.

Total Area

Maryland covers 12,407 square miles, making it the 42nd largest of the 50 states.

Highest Point

The highest point in Maryland is Hoye-Crest on Backbone Mountain at 3,360 feet above sea level.

Lowest Point

The lowest point in Maryland is sea level at the Atlantic Ocean.


Winter - 35° F and Summer 74° F
Average yearly rainfall is 40.46".

Record High and Low Temperatures
Cumberland: 109.0° F on July 10, 1936
(this temperature was also recorded on earlier dates)
LOW: Oakland: -40.0° F on January 13, 1912

Major Rivers

Patapsco River,
Patuxent River,
Potomac River,
Susquehanna River.

Major Lakes

Deep Creek Lake,
Loch Raven Reservoir,
Prettyboy Reservoir.

Largest Cities, Towns & Other Census Places
Census 2010