Headquartered in Montrouge near Paris, Île-de-France, O'Tacos has restaurants all over France and has also expanded internationally: it is found in various cities of Belgium, Brunei, Germany, Denmark, the Netherlands, Luxembourg, Spain, Portugal, Algeria and Morocco.

In January 2017, O'Tacos opened its first location in North America in the New York City borough of Brooklyn.

[8] On September 12, 2017, the publicized opening of a franchised restaurant in Valenciennes (with the presence of rapper Gradur) ended in clashes between the police and youths who came to the event.

After a stand-off between the local authorities and the franchise holders, the restaurant reopened in December, with many customers expressing their enthusiasm on social media.

Panic ensued in that part of the mall, as some customers believed they were under a terrorist attack, as reported by social media.