Auchan (French pronunciation: ​[oʃɑ̃]) is a French multinational retail group headquartered in Croix, France.[2] It was founded in 1961 by Gérard Mulliez and is owned by Mulliez Family, which has 95% stake in the company.[3] With 354,851 employees, of which 261,000 have 5% stake in the company, it is the 35th largest employer in the world.

The name comes from the first Auchan shop in Roubaix in the district of Hauts-Champs, the pronunciation of which is identical to that of "Auchan".[4]

The holding company, Auchan Holding, includes Auchan Retail International, Ceetrus, which operates shopping centers and Oney, which offers financial services. It operates as Alcampo in Spain ("al campo" is the literal Spanish translation of the French "au champ"), Auchan in Portugal, Aшан in Russia and Ukraine, and through a joint-venture as RT-Mart in China (Auchan brand is also used) and Taiwan.

As of 2019, Auchan is one of the world's largest retailers with a direct presence in France, Italy, Spain, Portugal, Luxembourg, Poland, Romania, Hungary, and China.