Géant Casino (French pronunciation: [ʒeɑ̃ kɑzino]) was a hypermarket chain based in Saint-Étienne, France, part of the French retailing giant Groupe Casino.

[1] Between June 2023 and October 2024, in the grip of a financial crisis linked to its debt, the group closed or sold all of its hypermarkets in France to competitors.

A loyalty card system has been introduced by Géant, with a price discount on certain groceries.

In june 2022, with the aim of re-emphasizing the food side of hypermarkets, and after the transfert of 29 hypermerkets to the brand Casino Supermarchés.

[4] For financial reasons, the group closed or sold all of its hypermarkets in France to competitors between June 2023 and October 2024.