The Voire (French pronunciation: [vwaʁ]) is a small river in France, in the drainage basin of the Seine. It is 56.2 km (34.9 mi) long.^[1] Its source is in Mertrud, in the Haute-Marne department. It flows through Montier-en-Der and Puellemontier, and empties into the river Aube at Chalette-sur-Voire, in the Aube department.