Vieux-Vy-sur-Couesnon (French pronunciation: [vjø vi syʁ kwenɔ̃], literally Vieux-Vy on Couesnon; Breton: Henwig-ar-C'houenon; Gallo: Vioez-Vic) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.

The neighboring communes are Romazy, Chauvigné, Saint-Christophe-de-Valains, Saint-Ouen-des-Alleux, Mézières-sur-Couesnon, Gahard, and Sens-de-Bretagne.

The name Vieux-Vy-sur-Couesnon probably comes from the Latin Vetus Victus, "old market town."

Industries: Inhabitants of Vieux-Vy-sur-Couesnon are called Vieuxviciens in French.

The village is served by just one bus route, the Rennes/Antrain line.