Dagon or Dagan was a god worshipped in ancient Syria across the middle of the Euphrates, with primary temples located in Tuttul and Terqa, though many attestations of his cult come from cities such as Mari and Emar as well. In settlements situated in the upper Euphrates area he was regarded as the "father of gods" similar to Mesopotamian Enlil or Hurrian Kumarbi, as well as a lord of the land, a god of prosperity, and a source of royal legitimacy. A large number of theophoric names, both masculine and feminine, attests that he was a popular deity. He was also worshiped further east, in Mesopotamia, where many rulers regarded him as the god capable of granting them kingship over the western areas.

Tuttul was an ancient Near East city. Tuttul is identified with the archaeological site of Tell Bi'a in Raqqa Governorate, Syria. Tell Bi'a is located near the modern city of Raqqa and at the confluence of the rivers Balikh and Euphrates.