The Potomac River is a representative river of the Eastern United States and is also a river imbued with American history and symbolism.

It is approximately 652 km long, making it the fourth largest river on the Atlantic coast of the United States and the 21st largest in the entire country. It begins at the Potomac Highlands, which is the border between West Virginia and Virginia, and flows through Chesapeake Bay into the Atlantic Ocean.

This river is not just a natural resource but a symbolic place intertwined with the history of the founding of the United States, flowing through the capital, Washington D.C. For Americans, the Potomac River means "the river flowing through the heart of the nation."

One of its tributaries, the Shenandoah River, meets the Potomac at the border of West Virginia and Virginia, and its beautiful scenery has appeared in numerous songs and poems. In particular, the "Shenandoah River" mentioned in John Denver's song 'Take Me Home, Country Roads' captures the essence of this region.

The Potomac River is connected to several small tributaries, including Dog Fork, which forms the border between Kentucky and West Virginia, and ultimately, all these waterways converge and flow into the Atlantic Ocean.

The section flowing through Washington D.C. is particularly symbolic. Because it crosses the heart of the U.S. capital, the Potomac has become a space intertwined with politics, history, and culture, rather than just a natural landscape.

Along the river are iconic buildings such as the Capitol, Lincoln Memorial, and Washington Monument, while on the opposite Virginia side are the Pentagon and Arlington National Cemetery. The various bridges connecting the two areas have become symbols linking America's past and present, as well as the history of the North and South.

The Potomac River is also considered one of the most beautiful cherry blossom spots in the United States. Over 3,000 cherry trees donated by Japan in 1912 were planted along this riverbank, completely transforming the spring scenery of Washington D.C. The annual 'National Cherry Blossom Festival' has since become a major attraction for tourists from around the world.

Nearby, Ronald Reagan Washington National Airport is located, and from the sky, one can see the Potomac River flowing around the city of Washington. The scene of planes descending in a curve along the river during landing is considered one of the representative views of this city.

A tragic incident involving a helicopter and a passenger plane occurred near the Potomac River on January 29, 2025, and is remembered as a very tragic event in the history of aviation accidents in the United States. At about 300 feet above the Ronald Reagan Washington National Airport near Washington D.C., a military helicopter Sikorsky UH-60 Black Hawk collided with a regional passenger plane American Airlines Flight 5342 (operated by PSA Airlines), causing both aircraft to fall into the river, resulting in the deaths of all 67 passengers, which made big news.