Chthon
Chthon, chthonian or chthonic may refer to:
Fiction
- Chthon (Marvel Comics), an Elder God of the Marvel Universe 
- House of Chthon, a major vampire house in Blade: The Series
 
 - Chthon (novel), a 1967 science fiction novel by Piers Anthony
 - Chthon (Quake), a boss in the computer game Quake
 - Chthon, a DC Comics character who appeared in Justice League Europe
 - Chthonian (Cthulhu Mythos), a fictional race created by Brian Lumley
 - The Chthonian, a New York City building where "The Brotherhood" met in Ralph Ellison's Invisible Man
 - The Chthonians, a major enemy faction from the computer game Grim Dawn
 - Cthulhu, literature: by H. P. Lovecraft in 1928, chosen to echo the word chthonic
 
Other uses
- Chthonian planet, a hypothetical class of celestial objects resulting from stripping away a gas giant's atmosphere
 - Chthonic deities, deities or spirits of the underworld in Greek mythology
 - Chthonic law
 - Chthonic (band), a Taiwanese black metal band
 - Chthonic, Psychological term: spirit of the nature within
 - Allochthon, structural geology: from the Greek "allo", meaning other, and "chthon". Process of the land mass being moved under the earth and connecting two horizontally stacked décollements and thus "under the earth"