Mallows Bay

Mallows Bay-Widewater Historic and Archeological District
A shipwreck at Mallows Bay, February 2011
LocationOff Sandy Point
Charles County, Maryland
Coordinates38°28′21.4″N 77°16′6.9″W / 38.472611°N 77.268583°W / 38.472611; -77.268583 (Mallows Bay, Potomac River, Maryland)
NRHP reference No.15000173
Added to NRHPApril 24, 2015

Mallows Bay is a small bay on the Maryland side of the Potomac River in Charles County, Maryland, United States. The bay is the location of what is regarded as the "largest shipwreck fleet in the Western Hemisphere" and is described as a "ship graveyard."

Mallows Bay is in the northeast corner of the Mallows Bay–Potomac River National Marine Sanctuary, which the National Oceanic and Atmospheric Administration designated on September 3, 2019. The bay lies in the northeast corner of the 18 square miles (47 km2) of Potomac River waters included in the sanctuary.