The Bungay River begins in Witch Pond in Foxborough, Massachusetts at an altitude of about 157 feet (48 m) above sea level.
It enters the Ten Mile River in Attleboro and ultimately empties into Narragansett Bay.
[1] According to published judgments by the Massachusetts Executive Office of Environmental Affairs, the river flows through the best red maple swamp in Massachusetts and provides some of the best canoeing across the state.
The West Branch and Black Brook are the only named tributaries, though there are many unnamed streams that also feed it.
It was first formed by a dam on the Bungay River in the 18th century near its confluence with the West Branch.