- Bolla
- Bomoh
- Bonhomme sept-heures
- Bonnacon
- Boo Hag
- Boobrie
- Book of Imaginary Beings
- Book of Revelation
- Borego Phantom
- Borley Rectory
- Borometz
- BotOp
- Botis
- Boto
- Bownessie
- Bran and Sgeolan
- Brenin Llwyd
- Briaou
- Bridgewater Triangle
- Bridgi
- Brigit
- Brocken bow
- Brosno dragon
- Brown Mountain Lights
- Brownie
- Broxa
- Bruce George Peter Lee
- Brunnmigi
- Brushman
- Bucca
- Buer
- Bugarik
- Bugbear
- Bugbear (Dungeons & Dragons)
- Buggane
- Bugul Noz
- Bukavac
- Bulbul Hezar
- Bulchin
- Bune
- Bungaya
- Bungisngis
- Bunnyman
- Bunyip
- Buraq
- Buratsche-al-Ilgs
- Bureaucrats
- Burmese Nat
- Burrokeet
- Buru
- Busaw
- Bush-asp
- Buta Kala
- Bwbachod
- Bánánach
- Bäckahäst
- Béla Kiss
- Cabal (novel)
- Cabyll-ushtey
- Cactus cat
- Cacus
- Caddy
- Cadejo
- Cadmus
- Cagrino
- Cailleach
- Caipora
- Cait Sith
- Caladrius
- Caleuche
- Caliban
- Callicantzaros
- Callirrhoe
- Calopus
- Calydonian Boar
- Camahueto
- Camazotz
- Cameleopard
- Camio
- Campe
- Candileja
- Cannibalism
- Canotila
- Canvey Island Monster
- Caoineag
- Caointeach
- Caoránach
- Capelobo
- Capirussa
- Carbuncle
- Carl Panzram
- Carmilla
- Cassiel
- Categories list
- Catoblepas
- Caul
- Cauld Lad of Hilton
- Cauld Lad of Hylton
- Cayetano Santos Godino
- Ccncelled
- Ceasg
- Cecrops
- Ceffyl dwfr
- Celestial (Dungeons & Dragons)
- Celestial Stag
- Celestial paragon
- Centaur
- Centaur (Dungeons & Dragons)
- Centipede
- Cerberus
- Cernunnos
- Cerridwen
- Ceryneian Hind
- Cetan
- Cetus
- Chakora
- Chalchihuitlicue
- Champ
- Chamrosh
- Chanda
- Chandi
- Chang and Eng Bunker
- Changeling
- Chantico
- Charles Albright
- Charles Manson
- Charon
- Charos
- Charybdis
- Cheap Pcb Fabrication Is Possible
- Chepi
- Cherufe
- Chessie
- Chhir Batti
- Chiang-shih
- Chichevache
- Chickcharney
- Chicken man
- Chilean blob
- Chimei
- Chimera
- Chindi
- Chinese Dragon
- Chinese ghosts
- Chinthe
- Chiranjivi
- Chiron
- Chlvnik
- Chnoubis
- Chollima
- Chonchon
- Choorail
- Choronzon
- Christian demonology
- Chrysaor
- Chuchunaa
- Chukwa
- Chupacabra
- Churel
- Chuvash dragon
- Chōchinobake
- Ciguapa
- Cihuateotl
- Cirein Croin
- Cirein cròin
- Civatateo
- Classification of demons
- Clinical lycanthropy
- Clive Barker
- Clootie
- Clurichaun
- Clytie
- Coblynau
- Coco
- Colin Ireland
- Collective Apparitions
- Colocolo
- Community portal
- Comprachicos
- Comtesse of Deux-Forts
- Conrit
- Content
- Content sources
- Cookie Monster
- Cornik
- Corocotta
- Corporeal undead
- Cotard delusion
- Couatl
- Crabman
- Crane-man
- Craquehhe
- Cressie
- Cretan Bull
- Crimbil
- Crisis Apparitions
- Crocell
- Crocotta
- Crom Cruach
- Crom Dubh
- Cronus
- Croquemitaine
- Crow Warrior
- Crybaby bridge
- Crying Boy
- Cryptid
- Cryptozoology
- Cthulhu
- Cthulhu Mythos
- Cu Sìth
- Cuca
- Cucuy
- Cuegle
- Cuelebre
- Culebre
- Curinquean
- Current events
- Curupira
- Cwn Annwn
- Cyclops
- Cyhyraeth
- Cynocephaly
- Cyoeraeth
- Dagon
- Dagwanoenyent
- Dahaka
- Dahu
- Daidarabotchi
- Daisy and Violet Hilton
- Daitya
- Dakhanavar
- Dalaka
- Dalaketnon
- Dalek
- Dalia
- Damarchus
- Damballa-Wedo
- Danava
- Daniel Barbosa
- Danu
- Daoine maite
- Darika
- Dark elf
- David Berkowitz
- Dawon
- Dean Koontz
- Death worm
- Decarabia
- Deer Woman
- Deildegast
- Demon
- Demon (Dungeons & Dragons)
- Demon Cat
- Demon lord (Dungeons & Dragons)
- Demonology
- Dendan
- Dennis Rader
- Derrick Todd Lee
- Derro
- Desghidorah
- Desmodus Draculae
- Destoroyah
- Deva
- Devil
- Devil's Dandy Dogs
- Devil (Dungeons & Dragons)
- Dhampir
- Diabolus Maris
- Didi
- Dievas
- Dila
- Dinosaur
- Dionysus
- Dip
- Divine Comedy
- Diwata
- Djadadjii
- Djall
- Dobhar-chu
- Dodo
- Dodola
- Dogū
- Dokkaebi
- Domovoi
- Donald Neilson
- Donn Cuailnge
- Doom 3
- Doppelgänger (Dungeons & Dragons)
- Doppelgänger
- Doppelsauger
- Dopplesauger
- Douen
- Dover Demon
- Drac
- Dracae
- Dracula
- Dragon
- Dragon (Dungeons & Dragons)
- Dragon (disambiguation)
- Dragon King
- Dragon blood
- Dragon of Brno
- Dragon of Loschy Hill
- Dragon of Mordiford
- Dragon of St. Leonards Forest
- Drangue
- Draug
- Dream Cycle
- Drekavac
- Drop bear
- Dropa
- Drosoulite
- Druk
- Drums of death
- Dryad
- Dub Sainglend
- Duende
- Duenne
- Duergar
- Dullahan
- Dungavenhooter
- Dungeons & Dragons
- Duppy
- Durga
- Dusios
- Dwarf
- Dybbuk
- Dziwozony
- Dziwożona
- Dzu-Teh
- E Bukura e Dheut
- Each uisce
- Each uisge
- Eagle Warrior
- Earle Nelson
- Earth fairy
- Ebirah
- Ebu Gogo
- Echidna
- Ectoplasm
- Ed Gein
- Eddie Leonski
- Eddy winds
- Edmund Kemper
- Edward Gorey