What is the name of the river that forms the border between Virginia and Maryland?

The river that forms the border between Virginia and Maryland is the Potomac River. This significant waterway flows approximately 383 miles, starting in West Virginia and eventually emptying into the Chesapeake Bay. The Potomac serves as an important geographical and political boundary, delineating the border between these two states.

Its historical relevance is also notable; the river has been pivotal in transportation and commerce since colonial times and remains a vital resource for both states today. The Potomac is also recognized for its scenic beauty and recreational opportunities, making it a cherished landmark for residents and visitors alike. The other rivers listed, such as the Ohio, Rio Grande, and Missouri, are not located in this region and do not serve as borders between Virginia and Maryland.