Vaux () or Vaux-en-Couhé () is a former commune in the Vienne department in the Nouvelle-Aquitaine region in western France. On 1 January 2019, it was merged into the new commune Valence-en-Poitou.
Its inhabitants are called the Valois and Valoises. It covered 25.8 km<sup>2</sup> and had 786 inhabitants in 2022. Surrounded by the communes of Chatillon, Romagna and Ceaux-en-Couhé, Vaux is located 33 km southwest of Poitiers, the largest city nearby.