The Treaty of Devol was an agreement made in 1108 between Bohemond I of Antioch and Byzantine Emperor Alexios I Komnenos, in the wake of the First Crusade. It is named after the Byzantine fortress of Devol. Although the treaty was not immediately enforced, it was intended to make the Principality of Antioch a vassal state of the Byzantine Empire.

Bohemond I of Antioch, also known as Bohemond of Taranto or Bohemond of Hauteville, was the prince of Taranto from 1089 to 1111 and the prince of Antioch from 1098 to 1111. He was a leader of the First Crusade, leading a contingent of Normans on the quest eastward. Knowledgeable about the Byzantine Empire through earlier campaigns with his father, he was the most experienced military leader of the crusade.