The town has two Catholic churches (one on either side of the river), the churches of Saint-Gilles et Sainte-Croix.
Saint-Gilles-Croix-de-Vie is part of the diocese of Luçon, which is part of the Ecclesiastical province of Rennes.
It is the seat of a deanery of four parishes: Sainte Anne de Riez (around the town of Saint-Hilaire-de-Riez), Saint Jean du Gué Gorand (Coëx), Saint Nicolas de l'Océan (Bretignolles-sur-Mer), and Notre Dame de la Vie (Saint-Gilles-Croix-de-Vie).
The latter, Notre Dame de la Vie, has four bell towers—in the churches of Saint-Gilles and Sainte-Croix, as well as those of Fenouiller and Givrand.

In the middle of the sixteenth century, a protestant church was founded in Saint-Gilles-sur-Vie; it was destroyed in November 1665, as one of seventeen protestant churches in the Bas-Poitou, the region that corresponds to today's Vendée.
The town has two Catholic churches (one on either side of the river), the churches of Saint-Gilles et Sainte-Croix. Saint-Gilles-Croix-de-Vie is part of the diocese of Luçon, which is part of the Ecclesiastical province of Rennes. It is the seat of a deanery of four parishes: Sainte Anne de Riez (around the town of Saint-Hilaire-de-Riez), Saint Jean du Gué Gorand (Coëx), Saint Nicolas de l'Océan (Bretignolles-sur-Mer), and Notre Dame de la Vie (Saint-Gilles-Croix-de-Vie). The latter, Notre Dame de la Vie, has four bell towers—in the churches of Saint-Gilles and Sainte-Croix, as well as those of Fenouiller and Givrand.
In the middle of the sixteenth century, a protestant church was founded in Saint-Gilles-sur-Vie; it was destroyed in November 1665, as one of seventeen protestant churches in the Bas-Poitou, the region that corresponds to today's Vendée.
Saint-Gilles-Croix-de-Vie