Saint-Julien-de-Concelles (French pronunciation: [sɛ̃ ʒyljɛ̃ də kɔ̃sɛl] ⓘ; Breton: Sant-Juluan-Kankell) is a commune in the Loire-Atlantique department in western France.

Its flat and sandy land is suited to growing vegetables, such as leeks, and some flowers.

[citation needed] Saint-Julien-de-Concelles also grows the grapes on its hills that produce local Muscadet wine.

A large lake, known as the Plan d'Eau du Chêne, is located near to the center of Saint-Julien-de-Concelles.

The lake supports sailing, fishing, various sports and attracts walkers and nature lovers.