The Potomac River flows into Chesapeake Bay, located along the mid-Atlantic coast of the United States (USA). The river is approximately 413 statute miles (665 km) long, with a drainage area of about 14,700 square miles (38,000 km²). In terms of area, this makes the Potomac River the fourth largest river along the Atlantic coast of the USA and the 21st largest in the USA.
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