Auchan SA is a French international retail group and multinational corporation headquartered in Croix, France. It is one of the world's principal distribution groups with a presence in 12 countries and 175,000 employees. Auchan has national branches in France, and international branches in Italy, Spain, Portugal, Luxembourg, Poland, Hungary, Russia, Morocco, the People's Republic of China, the Republic of China (Taiwan), Romania, and Ukraine.

As of 26 October 2005, Auchan has 356 hypermarkets, 646 supermarkets and 2027 small shops around the world.

Auchan SA is controlled by the Mulliez family, one of the wealthiest in France. The Mulliez family has created a number of companies: Decathlon (sports stores), Norauto (car repairs), ADEO Group (DIY Shops), Boulanger (electronic devices shops), Phildar (Fabric Stores), Accord Bank (loans), Kiabi (Clothes shops), Cultura (cultural products), Pimkie (Clothes).