Therion (Greek for "wild animal" or "beast" (θηρίον)) may refer to:
- Therion (band), a Swedish metal band
- Therion (constellation), the name that the ancient Greeks gave to the constellation Lupus
- Therion (software), a cave cartography programme
- Therion (Thelema), a god in Thelema, consort of Babalon
- Therion (wasp), a genus of wasps
- The Beast (Revelation), a monster from the Book of Revelation