The Potomac River (/ p ə ˈ t oʊ m ə k / ( listen)) is located within the Mid-Atlantic region of the United States and flows from the Potomac Highlands into the Chesapeake Bay. The river (main stem and North Branch) is approximately 405 miles (652 km) long, with a drainage area of about 14,700 square miles (38,000 km 2). read more
The Potomac River is 405 miles (652 km) in length, and forms part of the border between Washington DC and Virginia on the left bank, as well as Maryland and Virginia on the right. With a drainage area of about 14,700 square miles (38,000 square km), the river is the fourth largest river along the Atlantic coast of the United States. read more