Dagon is an ancient Semitic god.
Dagon may also refer to:
- Dagon, name used by Josephus for Dok, ancient fortress near Jericho
- Dagon (butterfly), a butterfly genus
- Dagon (novel), a 1968 novel by Fred Chappell
- Dagon (Cthulhu Mythos), a deity in H. P. Lovecraft's Cthulhu Mythos
- "Dagon" (short story), a 1917 short story by H. P. Lovecraft
- Dagon (film), a 2001 film based on H. P. Lovecraft's novella The Shadow over Innsmouth
- Dagon (Dungeons & Dragons), a deity in Dungeons & Dragons
- Dagon, California, a town in Amador County, California, USA
- Dagon International, a Burmese conglomerate
- Dagon Township, a neighborhood of Yangon, Myanmar
- Dagon University, a university in Yangon
- Dagon (planet) or Fomalhaut b, an exoplanet
- Nightrider (DC Comics) or Dagon, a DC Comics character
- The Dagons, a psychedelic band from Los Angeles
- Mehrunes Dagon, the main villain in The Elder Scrolls IV: Oblivion
- Dagon, a minor villain in the Jujutsu Kaisen series.