The Deciates (Δεκιήταις) were a Ligurian tribe dwelling near on the Mediterranean coast, around present-day Antibes, during the Iron Age and the Roman era.
"[8] The Deciates dwelled on the Mediterranean coast, west of the river Loup, around the Massaliote colony of Antipolis (modern Antibes).
[14] This does not necessarily imply that it had been the main centre of the Deciates, and Barruol has proposed to identify the site of Grasse as their chief town.
[16][17] The Decietae now arrived in full force, thinking that they would take part in the battle side by side with the Oxybii, but arriving after all was over, received the fugitives into their ranks; they shortly afterward attacked the Romans with great spirit and resolution, but when worsted in the fight at once unconditionally surrendered themselves and their city.
Opimius having overcome these tribes added as much of their territory as he thought fit to that of Marseilles, and compelled the Ligurians to give the Massaliots in future hostages for certain periods.