Dagon (Hebrew: דָּגוֹן, Dāgōn) or Dagan (Sumerian: 𒀭𒁕𒃶, romanized: ^dda-gan; Phoenician: 𐤃𐤂𐤍, romanized: Dāgān) 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.

Attestations of Dagan from coastal areas are much less frequent and come mostly from the northern city of Ugarit, where Dagan's cult had a limited scope. According to the Hebrew Bible, Dagan was also the national god of the Philistines, with temples at Ashdod and Gaza, but there is no extrabiblical evidence confirming this. The extrasolar object designated Fomalhaut b is named after Dagon.