The Graioceli were a small Gallic tribe dwelling in the valley of Maurienne, in the modern region of Savoie, during the Iron Age.
They are mentioned as Graioceli (<small>var.</small> graiocaeli, gaioceli) by Caesar (mid-1st c. BC).
The etymology of the ethnonym Graioceli remains unclear. It possibly contains a divine name *Graios (found in Herculi/Herculeio Graio) attached to the Gaulish root ocel-, meaning 'peak, summit, promontory'. The same stem is also present in the name of the Alpes Graiae.
The Graioceli dwelled in the Maurienne Valley, around the modern towns of Saint-Jean-de-Maurienne and Saint-Jean-d'Arves. Their territory was located the southeast of the Allobroges, south of the Ceutrones, north of the Ucennii, and west of the Medulli.
In the mid-first century BC, the Graioceli are mentioned by Julius Caesar as a tribe hostile to Rome. In what appears to be a concerted attack, they attempted to prevent his passage through the upper Durance alongside the Ceutrones and Caturiges in 58 BC.