North River is a tributary of the Cacapon River, belonging to the Potomac River and Chesapeake Bay watersheds. The river is located in Hampshire and Hardy counties in the U.S. state of West Virginia's Eastern Panhandle. The mouth of North River into the Cacapon is located at Forks of Cacapon. From its headwaters to its mouth, the North River spans over 44 miles (70.81 km) in length.