The Oude Maas (English: Old Meuse) is a distributary of the river Rhine, and a former distributary of the river Maas, in the Dutch province of South Holland.
It begins at the city of Dordrecht where the Beneden Merwede river splits into the Noord Mass (North Meuse) and the Oude Maas (Old Meuse).It ends when it joins the Nieuwe Maas to form Het Scheur river.
