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Washington DC is on the Potomac River, which also separates Virginia from Maryland
Washington D.C. is the capital of the United States and is formally known as the District of Columbia. It is located along the Potomac River.
potamic river
Potomac River
Washington DC is on the Potomac River. On the far side is Virginia (Arlington, and the Pentagon). To the southeast is the Anacostia River.
The Potomac River separates Maryland and Virginia.