List of legendary creatures (C)
- Cabeiri – Smith and wine spirit
- Cacus – Fire-breathing giant
- Cadejo – Cow-sized dog-goat hybrid
- Cailleach – Divine creator and weather deity hag
- Caipora – Fox-human hybrid and nature spirit
- Caladrius – White bird that can foretell if a sick person will recover or die
- Calingi – Humanoid with an eight-year lifespan
- Callitrix – Apes who always bear twins, one the mother loves, the other it hates
- Calydonian Boar – Giant, chthonic boar
- Calygreyhound – Wildcat-deer/antelope-eagle-ox-lion hybrid
- Camahueto – One-horned calf
- Camazotz – Underworld bat spirit
- Cambion – Offspring of a human and an incubus or succubus
- Campe – Dragon-human-scorpion hybrid
- Camulatz – Bird that ate the heads of the first men
- Candileja – Spectral, fiery hag
- Canaima – Were-jaguar
- Canotila – Little people and tree spirits
- Caoineag – Death spirit
- Căpcăun – Large, monstrous humanoid
- Carbuncle – Small creature with a jewel on its head
- Cath Palug – Monstrous cat
- Catoblepas – Scaled buffalo-hog hybrid
- Cat Sidhe – Fairy cat
- Ceasg – Benevolent Scottish mermaids
- Ceffyl Dŵr – Malevolent water horse
- Centaur – Human-horse hybrid
- Centicore – Horse-Antelope-Lion-Bear hybrid
- Cerastes – Extremely flexible, horned snake
- Cerberus – Three-headed dog that guards the entrance to the underworld
- Cercopes – Mischievous forest spirit
- Cericopithicus – Apes who always bear twins, one the mother loves, the other it hates
- Ceryneian Hind – Hind with golden antlers and bronze or brass hooves
- Cetus - Large sea monster
- Chakora – Lunar bird
- Chalkydri – Angelic birds
- Chamrosh – Dog-bird hybrid
- Chaneque – Little people and nature spirits
- Changeling – Humanoid child substituted for a kidnapped human child
- Čhápa – Beaver spirit
- Chareng — Semi-hornbill, semi-human creature
- Charybdis – Sea monster in the form of a giant mouth
- Chenoo – Giant, human-eating ice monsters; former humans who either committed terrible crime or were possessed by evil spirits, turning their hearts to ice
- Chepi – Ancestral spirit that instructs tribe members
- Cherufe – Volcano-dwelling monster
- Cheval Mallet – Evil horse who runs away with travelers
- Cheval Gauvin – Evil horse who drowns riders, similar to kelpie
- Chibaiskweda – Ghost of an improperly buried person
- Chichevache – Human-faced cow that feeds on good women
- Chickcharney – Bird-mammal hybrid
- Chimaera – Lion-goat-snake hybrid
- Chimimōryō – Spirits of mountains and rivers
- Chindi – Vengeful ghost that causes dust devils
- Chinthe – Temple-guarding feline, similar to Chinese Shi and Japanese Shisa
- Chitauli – Human-lizard hybrid
- Chōchin'obake – Animated paper lantern
- Chol – Regenerative bird
- Chollima – Supernaturally fast horse
- Chonchon – Disembodied, flying head
- Choorile – Ghost of a woman that died in childbirth
- Chort – Malign spirit or demon
- Chromandi – Hairy savage with dog teeth
- Chrysaor – Giant son of the gorgon Medusa
- Chrysomallus – Golden winged ram
- Chukwa – Giant turtle that supports the world
- Chullachaki
- Chupacabra – Cryptid beast named for its habit of sucking the blood of livestock
- Church grim – Guardian spirit
- Churel – Vampiric, female ghost
- Chut – Household spirit
- Ciguapa – Malevolent seductress
- Cihuateteo – Ghost of women that died in childbirth
- Cikavac – Bird that serves its owner
- Cinnamon bird – Giant bird that makes its nest out of cinnamon
- Cipactli – Sea monster, crocodile-fish hybrid
- Cipitio
- Cirein cròin – Sea serpent
- Coblynau – Little people and mine spirits
- Cockatrice – Chicken-lizard hybrid
- Cofgod – Cove god
- Coinchenn – Sea monster
- Colo Colo – Rat-bird hybrid that can shapeshift into a serpent
- Corycian nymphs – Nymph of the Corycian Cave
- Cretan Bull – Monstrous bull
- Crinaeae – Fountain nymph
- Criosphinx – Ram-headed sphinx
- Crocotta – Monstrous dog-wolf
- The Cu Bird – El Pájaro Cu; a bird
- Cuco – Bogeyman
- Cucuy – Malevolent spirit
- Cuegle – Monstrous, three-armed humanoid
- Cuélebre – Dragon
- Curruid – Sea monster
- Curupira – Nature spirit
- Cu Sith – Gigantic fairy dog
- Cŵn Annwn – Underworld hunting dog
- Cyclops – One-eyed giant
- Cyhyraeth – Death spirit
- Cynocephalus – Dog-headed humanoid