Calvisson (French pronunciation: [kalvisɔ̃]; Provençal: Cauviçon) is a commune in the Gard department in the Occitanie region in southern France.

It is in the northern foothills of the Vaunage, a fertile valley surrounded by a rim of limestone hills rising to 200 m. The most prominent hill is the Rock of Gachone, which was the site of an important oppidum, or a fortified town, under the Romans.

In 1304 King Philip IV of France gave to Guillaume de Nogaretas a fiefdom.

The Camisards operated throughout the mainly protestant Cévennes region which in the early years of the eighteenth century also included the Vaunage and the parts of the Camargue around Aigues Mortes.

In 1787, the Rock of Gachone which stands above the village is used as triangulation point by Jean-Dominique Cassini for mapping the area.