The Agrianes or Agrianians, were a Paeonian or Thracian tribe, whose country was centered at Upper Strymon, in present-day central Western Bulgaria as well as southeasternmost Serbia, at the time situated north of the Dentheletae. Per Strabo, the source of the river Strymon was within Agrianes' territory. In the time of Philip II of Macedon, the territory of the Agrianes was administered by Pella and they fought under the command of General Attalus. They were crack javelin throwers and an elite unit of Alexander the Great's light infantry.