La Grand-Croix () is a commune and the seat of a canton in the Loire department in central France. It lies in the Gier valley.
The commune was the main town of the former canton of La Grand-Croix, arrondissement of Saint-ÃÂtienne.
It lies on the A47 autoroute. Lyon is to the east, and Saint-ÃÂtienne is to the west. The commune is close to the Parc Naturel Régional du Pilat.
The river Dorlay, a tributary of the Gier that rises in Mont Pilat, forms the border between La Grand-Croix and Lorette.
Gustave Malécot (28 December 1911 â 1998), mathematician
La Grand-Croix is twinned with: