Dissay (French pronunciation: [disɛ]) is a commune in the Vienne department in the Nouvelle-Aquitaine region in western France.

The main landmark is the castle, built in the 15th century by Pierre d'Amboise, bishop of Poitiers.

Human settlement in the territory of Dissay dates back millennia: a single grave in Poitou-Charentes dates back to 4300 BC.

Gallo-Roman houses spring up along the Roman road that links Saintes to Poitiers Tours.

The territory of Dissay is arranged like an axis, with this road as one of the lines.