Ivan Bilibin's Alkonost
Ivan Bilibin's Alkonost

* Abarimon (Medieval Bestiaries) - Savage humanoid with backward feet
* Abath (Malay) - One-horned animal
* Abatwa (Zulu) - Little people that ride ants
* Abumi-guchi (Japanese) - Furry creature formed from the stirrup of a mounted military commander
* Abura-akago (Japanese) - Oil-drinking infant
* Abura-bō (Japanese) - Spectral fire from Shiga Prefecture, in which the shape of a monk can often be seen
* Abura-sumashi (Japanese) - Ghost of oil thieves
* Adar Llwch Gwin (Welsh) - Giant birds that understand human languages
* Adaro (Solomon Islands) - Malevolent merfolk
* Adlet (Inuit) - Vampiric dog-human hybrid
* Adroanzi (Lugbara) - Nature spirit
* Adze (Ewe people) - African vampiric forest being
* Afanc (Welsh) - Lake monster (exact lake varies by story)
* Agloolik (Inuit) - Ice spirit that aids hunters and fishermen
* Agogwe (East Africa) - Small, ape-like humanoid
* Ahuizotl (Aztec) - Anthropophagous dog-monkey hybrid
* Aigamuxa (Khoikhoi) - Anthropohagous humanoid with eyes in its instep
* Aigikampoi (Etruscan) - Fish-tailed goat
* Aitu (Polynesian) - Malevolent spirits or demons
* Aitvaras (Lithuanian) - Household spirit
* Ajatar (Finnish) - Dragon
* Akabeko (Japanese) - Red cow involved in the construction of Enzō-ji in Yanaizu, Fukushima
* Akamataa (Japanese) - Snake spirit from Okinawa
* Akaname (Japanese) -Bathroom spirit
* Akashita (Japanese) - Giant beast
* Akateko (Japanese) - Tree-dwelling monster
* Akhlut (Inuit) - Orca-wolf shapeshifter
* Akka (Finnish) - Female spirits or minor goddesses
* Akki (Japanese) - Large, grotesque humanoid
* Akkorokamui (Ainu) - Sea monster
* Akuma (Japanese)] - Evil spirit
* Akupara (Hindu) - Giant turtle that supports the world
* Akurojin-no-hi (Japanese) - Ghostly flame which causes disease
* Al (Armenian and Persian) - Spirit that steals unborn babies and livers from pregnant women
* Ala (Slavic) - Bad weather demon
* Alal (Chaldean) - Demon
* Alan (Philippine) - Winged humanoid that steals reproductive waste to make children
* Al Basti (Turkish) - Female night-demon
* Alce (Heraldic) - Wingless griffin
* Alerion (Medieval Bestiary) - King of the birds
* Alicanto (Chilean) - Bird that eats gold and silver
* Alicorn - Technically a unicorn's horn. In modern times is commonly misapplied to winged unicorns
* Alkonost (Slavic) - Angelic bird with human head and breasts
* Allocamelus (Heraldic) - Ass-camel hybrid
* Allu (Akkadian and Sumerian) - Faceless demon
* Almas (Mongolian) - Savage humanoid
* Al-mi'raj (Islamic) - One-horned rabbit
* Aloja (Spanish) - Female water spirit
* Alom-bag-winno-sis (Abenaki) - Little people and tricksters
* Alp (German) - Male night-demon
* Alphyn (Heraldic) - Lion-like creature, sometimes with dragon or goat forelegs
* Al Rakim (Islamic) - Guard dog of the Seven Sleepers
* Alseid (Greek) - Grove nymph
* Alû (Assyrian) - Leprous demon
* Alux (Mayan) - Little people
* Amaburakosagi (Japanese) - Ritual disciplinary demon from Shikoku
* Amala (Tsimshian) - Giant who holds up the world
* Amamehagi (Japanese) - Ritual disciplinary demon from Hokuriku
* Amanojaku (Japanese) - Small demon
* Amarok (Inuit) - Giant wolf
* Amarum (Quechua) - Water boa spirit
* Amazake-babaa (Japanese) - Disease-causing hag
* Amefurashi (Japanese) - Child-like monster
* Amefurikozō (Japanese) - Child-like weather spirit
* Amemasu (Ainu) - Lake monster
* Ameonna (Japanese) - Female rain spirit
* Amikiri (Japanese) - Snake-bird-lobster hybrid
* Amorōnagu (Japanese) - Tennyo from the island of Amami Ōshima
* Amphiptere (Heraldic) - Winged serpent
* Amphisbaena (Greek) - Serpent with a head at each end
* Anakim (Jewish) - Giant
* Androsphinx (Ancient Egyptian) - Human-headed sphinx
* Angel (Christian, Islamic, Jewish, and Zoroastrian) - Heavenly being, usually a winged humanoid
* Angha (Persian) - Dog-lion-peacock hybrid
* Ani Hyuntikwalaski (Cherokee) - Lightning spirit
* Ankou (French) - Skeletal grave watcher with a lantern
* Anmo (Japanese) - Ritual disciplinary demon from Iwate Prefecture
* Antero Vipunen (Finnish) - Subterranean giant
* Aoandon (Japanese) - Spirit summoned at the end of a story-telling contest
* Ao Ao (Guaraní) - Anthropophagous peccary or sheep
* Aobōzu (Japanese) - Blue monk who kidnaps children
* Aonyōbō (Japanese) - Female ghost who lurks in an abandoned imperial palace
* Aosaginohi (Japanese) - Glowing heron
* Apkallu (Sumerian) - Fish-human hybrid that attends the god Enki
* Apsaras (Buddhist and Hindu) - Female cloud spirit
* Aqrabuamelu (Akkadian) - Human-scorpion hybrid
* Ardat-Lili (Akkadian) - Disease demon
* Arikura-no-baba (Japanese) - Old woman with magical powers
* Arimaspi (Greek) - One-eyed humanoid
* Arkan Sonney (Manx) - Fairy hedgehog
* Asag (Sumerian) - Hideous rock demon
* Asakku (Sumerian) - Demon
* Asanbosam (West Africa) - Iron-toothed vampire
* A-senee-ki-wakw (Abenaki) - Stone-giant
* Ashi-magari (Japanese) - Invisible tendril that impedes movement
* Asiman (Dahomey) - Vampiric possession spirit
* Askefrue (Germanic) - Female tree spirit
* Ask-wee-da-eed (Abenaki) - Fire elemental and spectral fire
* Asobibi (Japanese) - Spectral fire from Kōchi Prefecture
* Aspidochelone (Medieval Bestiaries) - Island-sized whale or sea turtle
* Astomi (Hindu) - Humanoid sustained by pleasant smells instead of food
* Aswang (Philippine) - Carrion-eating humanoid
* Ato-oi-kozō (Japanese) - Invisible spirit that follows people
* Atshen (Inuit) - Anthropophagous spirit
* Auloniad (Greek) - Pasture nymph
* Awa-hon-do (Abenaki) - Insect spirit
* Axex (Ancient Egyptian) - Falcon-lion hybrid
* Ayakashi (Japanese) - Sea-serpent that travels over boats in an arc while dripping oil
* Ayakashi-no-ayashibi (Japanese) - Spectral fire from Ishikawa Prefecture
* Aziza (Dahomey) - Little people that help hunters
* Azukiarai (Japanese) - Spirit that washes azuki beans along riversides
* Azukibabaa (Japanese) - Bean-grinding hag who devours people
* Azukitogi (Japanese) - Spirit that washes azuki beans along riversides


Buraq from a 17th-century Mughal miniature
Buraq from a 17th-century Mughal miniature

* Baba Yaga (Slavic) - Forest spirit and hag
* Bagiennik (Slavic) - Malevolent water spirit
* Bahamut (Arabian) - Giant fish
* Bai She (Chinese) - Elephant-swallowing serpent
* Bai Ze (Chinese) - Sheep-like animal
* Bake-kujira (Japanese) - Ghost whale
* Bakeneko (Japanese) - Magical cat
* Bakezōri (Japanese) - Animated straw sandal
* Bakhtak (Iranian) - Night demon
* Baku (Japanese) - Dream-devouring, tapir like creature
* Bakunawa (Philippine) - Sea serpent that causes eclipses
* Balaur (Romanian) - Multi-headed dragon
* Bannik (Slavic) - Bathhouse spirit
* Banshee (Irish) - Death spirit
* Barbegazi (Swiss) - Dwarf with giant, snowshoe-like feet
* Bardi (Trabzon) - Shapechanging death spirit
* Barghest - Yorkshire black dog
* Barnacle Geese (Medieval folklore) - Geese which hatch from barnacles
* Barong (Balinese) - Tutelary spirit
* Basajaun (Basque) - Ancestral, megalith-building race
* Basan (Japanese) - Fire-breathing chicken
* BasCelik (Serbian) - A powerful and very evil winged man whose soul is not held by his body and can be subdued only by causing him to suffer dehydration
* Basilisco Chilote (Chilota) - Chicken-serpent hybrid
* Basilisk (Medieval Bestiaries) - Multi-limbed, venomous lizard
* Batibat (Philippine) - Female night-demon
* Batsu (Chinese) - Drought spirit
* Baubas (Lithuanian) - Malevolent spirit
* Baykok (Ojibwa) - Flying skeleton
* Bean Nighe (Irish) - Death spirit (a specific type of Banshee/Bean Sídhe)
* Behemoth (Jewish) - Primal, gigantic land animal
* Bendigeidfran (Welsh) - Giant king
* Bennu (Egyptian) - Heron-like, regenerative bird, equivalent to (or inspiration of) the Phoenix
* Berehynia (Slavic) - Water spirit
* Bergrisar (Norse) - Mountain giant
* Bergsrå (Norse) - Mountain spirit
* Bestial beast (Brazilian) - Centauroid specter
* Betobeto-san (Japanese) - Invisible spirit which follows people at night, making the sound of footsteps
* Bhūta (Buddhist and Hindu) - Ghost of someone killed by execution or suicide
* Bi-blouk (Khoikhoi) - Female, anthropohagous, partially invisible monster
* Bies (Slavic) - Demon
* Binbōgami (Japanese) - Spirit of poverty
* Bishop-fish (Medieval Bestiaries) - Fish-like humanoid
* Biwa-yanagi (Japanese) - Animated biwa
* Black Annis (English) - Blue-faced hag
* Black Dog (British) - Canine death spirit
* Black Shuck - Norfolk, Essex, and Suffolk black dog
* Blemmyae (Medieval Bestiary) - Headless humanoid with face in torso
* Bloody Bones (Irish) - Water bogeyman
* Bodach (Scottish) - Malevolent spirit
* Bogeyman (English) - Malevolent spirit
* Boggart (British) - Malevolent household spirit
* Boginki (Polish) - Nature spirit
* Bogle (Scottish) - Malevolent spirit
* Boi-tatá (Brazilian) - Giant snake
* Bolla (Albanian) - Dragon
* Bonnacon (Medieval Bestiaries) - Bull-horse hybrid with flaming dung
* Boobrie (Scottish) - Roaring water bird
* Bozaloshtsh (Slavic) - Death spirit
* Brag (English) - Malevolent water horse
* Brownie (English and Scottish) - Benevolent household spirit
* Broxa (Jewish) - Nocturnal bird that drains goats of their milk
* Bokkenrijders (Dutch) - Damned bandits
* Bugbear (English) - Bearlike goblin
* Buggane (Manx) - Ogre-like humanoid
* Bukavac (Serbia) - Six-legged lake monster
* Bunyip (Australian Aboriginal) - Horse-walrus hybrid lake monster
* Buraq (Islamic) - Human-headed, angelic horse
* Buruburu (Japanese) - Spirit which causes the shivers
* Byaka (Russian) - Furry creature
* Byangoma (Hindu) - Fortune-telling birds
* Bysen (Scandinavian) - Diminutive forest spirit
* Cabeiri (Greek) - Smith and wine spirits
* Cacus (Roman) - Fire-breathing giant
* Cadejo (Central America) - Cow sized dog-goat hybrid in two varieties: benevolent and white, and malevolent and black
* Caipora (Tupi) - Fox-human hybrid and nature spirit
* Caladrius (Medieval Bestiary) - White bird that can foretell if a sick person will recover or die
* Calydonian Boar (Greek) - Giant, chthonic boar
* Camahueto (Chilota) - One-horned calf
* Cambion (Medieval folklore) - Hybrid between a human and an incubus or succubus
* Campe (Greek) - Dragon-human-scorpion hybrid
* Candileja (Colombian) - Spectral, fiery hag
* Canotila (Lakota) - Little people and tree spirits
* Caoineag (Scottish) - Death spirit (a specific type of Banshee/Bean Sídhe)
* Capa (Lakota) - Beaver spirit
* Căpcăun (Romanian) - Large, monstrous humanoid
* Catoblepas (Medieval Bestiary) - Scaled buffalo-hog hybrid
* Cat Sidhe (Scottish) - Fairy cat
* Cecaelia - Modern term for mermaid-like, human-octopus hybrid
* Ceffyl Dŵr (Welsh) - Malevolent water horse
* Centaur (Greek) - Human-horse hybrid
* Cerastes (Greek) - Extremely flexible, horned snake
* Cerberus (Greek) - Three-headed dog that guards the entrance to the underworld
* Cercopes (Greek) - Mischievous forest spirit
* Ceryneian Hind (Greek) - Hind with golden antlers and bronze or brass hooves
* Cetan (Lakota) - Hawk spirit
* Chakora (Hindu) - Lunar bird
* Chamrosh (Persian) - Dog-bird hybrid
* Chaneque (Aztec) - Little people and nature spirits
* Changeling (European) - Non-human humanoid child (fairy, elf, troll, etc.) substituted for a kidnapped human child
* Charybdis (Greek) - Sea monster in the form of a giant mouth
* Chepi (Narragansett) - Ancestral spirit that instructs tribe members
* Cherufe (Mapuche) - Volcano-dwelling monster
* Chibaiskweda (Abenaki) - Ghost of an improperly buried person
* Chichevache (Medieval folklore) - Human-faced cow that feeds on good women
* Chickcharney (Bahaman) - Bird-mammal hybrid
* Chimaera (Greek) - Lion-goat-snake hybrid
* Chindi (Navajo) - Vengeful ghosts that cause dust devils
* Chinthe (Burmese) - Temple-guarding feline, similar to Chinese Shi and Japanese Shisa
* Chitauli (Zulu) - Human-lizard hybrid
* Chōchinobake (Japanese) - Animated paper lantern
* Chollima (Korean) - Supernaturally fast horse
* Chonchon (Mapuche) - Disembodied, flying head
* Chrysaor (Greek) - Son of the gorgon Medusa, imaged as a giant or a winged boar
* Chukwa (Hindu) - Giant turtle that supports the world
* Churel (Hindu) - Vampiric, female ghost
* Ciguapa (Dominican Republic) - Malevolent seductress
* Cihuateteo (Aztec) - Ghosts of women that died in childbirth
* Cikavac (Serbian) - Bird that serves its owner
* Cinnamon bird (Medieval Bestiaries) - Giant bird that makes its nest out of cinnamon
* Cipactli (Aztec) - Sea monster, crocodile-fish hybrid
* Cirein cròin (Scottish) - Sea serpent
* Cluricaun (Irish) - Leprechaun-like Little people that are permanently drunk
* Coblynau (Welsh) - Little people and mine spirits
* Cockatrice (Medieval Bestiaries) - Chicken-lizard hybrid
* Cofgodas (Anglo-Saxon) - House sprit
* Colo Colo (Mapuche) - Rat-bird hybrid that can shapeshift into a serpent
* Corycian nymphs (Greek) - Nymph of the Corycian Cave
* Cretan Bull (Greek) - Monstrous bull
* Crinaeae (Greek) - Fountain nymph
* Criosphinx (Ancient Egypt) - Ram-headed sphinx
* Crocotta (Medieval Bestiaries) - Monstrous dog-wolf
* Cuco (Latin America) - Bogeyman
* Cucuy (Latin America) - Malevolent spirit
* Cuegle (Cantabrian) - Monstrous, three-armed humanoid
* Cuélebre (Asturian and Cantabrian) - Dragon
* Curupira (Tupi) - Nature spirit
* Cu Sith (Scottish) - Gigantic fairy dog
* Cŵn Annwn (Welsh) - Underworld hunting dogs
* Cyclops (Greek) - One-eyed giants
* Cyhyraeth (Welsh) - Death spirit
* Cynocephalus (Medieval Bestiaries) - Dog-headed humanoid

* Dactyl (Greek) - Little people and smith and healing spirits
* Daemon (Greek) - Incorporeal spirit
* Daidarabotchi (Japanese) - Giant responsible for creating many geographical features in Japan
* Daitengu (Japanese) - The most powerful class of tengu, each of whom lives on a separate mountain
* Daitya (Hindu) - Giant
* Danava (Hindu) - Water demon
* Daphnaie (Greek) - Laurel tree nymph
* Datsue-ba (Japanese) - Old woman who steals clothes from the souls of the dead
* Dead Sea Apes (Islamic) - Human tribe turned into apes for ignoring Moses' message
* Deer Woman (Native American) - Human-deer hybrid
* Deity (Global) - Preternatural or supernatural being
* Demon - Malevolent spirit
* Dhampir (Balkans) - Hybrid between a human and a vampire
* Dip (Catalan) - Demonic and vampiric dog
* Di Penates (Roman) - House spirit
* Dipsa (Medieval Bestiaries) - Extremely poisonous snake
* Dirawong (Australian Aboriginal) - Goanna spirit
* Di sma undar jordi (Gotland) - Little people and nature spirits
* Diwata (Philippine) - Tree spirit
* Dobhar-chu (Irish) - Dog-fish hybrid
* Dodomeki (Japanese) - Ghost of a pickpocket, her arms are covered in eyes
* Do-gakw-ho-wad (Abenaki) - Little people
* Dokkaebi (Korean) - Grotesque, one-legged humanoids
* Dökkálfar (Norse) - Male ancestral spirits
* Dola (Slavic) - Tutelary and fate spirit
* Domovoi (Slavic) - House spirit
* Doppelgänger (German) - Ghostly double
* Dorotabō (Japanese) - Ghost of an old man whose rice fields were neglected and sold
* Drac (Catalan) - Lion or bull-faced dragon
* Drac (French) - Winged sea serpent
* Dragon
* Dragon turtle (Chinese) - Giant turtle with dragon-like head
* Draugr (Norse) - Undead
* Drekavac (Slavic) - Restless ghost of an unbaptised child
* Drow (Scottish) - Cavern spirit
* Drude (German) - Possessing demon
* Dryad (Greek) - Tree nymph
* Duende (Spanish) - Little people and forest spirits
* Duergar (English) - Malevolent little people
* Dullahan (Irish) - Headless death spirit
* Duwende (Philippine) - Little people, some are house spirits, others nature spirits
* Dvergr (Norse) - Subterranean little people smiths
* Dvorovoi (Slavic) - Courtyard spirit
* Dwarf (Germanic) - Little people nature spirits
* Dybbuk (Jewish) - Possessing spirit
* Dzee-dzee-bon-da (Abenaki) - Hideous monster
* Dzunukwa (Kwakwaka'wakw) - Child-eating hag
"The Erlking", by Albert Sterner, ca. 1910
"The Erlking", by Albert Sterner, ca. 1910

* Each Uisge (Scottish) - Malevolent water horse
* Eachy (English and Scottish) - Humanoid lake monster
* Eagle Spirit (Many cultures worldwide) - Leadership or guidance totem
* Ebu Gogo (Flores) - Diminutive humanoids, possibly inspired by Homo floresiensis
* Echeneis (Medieval Bestiaries) - Remora, said to attach to ships to slow them down
* Edimmu (Sumerian) - Ghosts of those not buried properly
* Egbere (Yoruba) - Humanoid that carries a magical mat
* Einherjar (Norse) - Spirits of brave warriors
* Ekek (Philippine) - Flesh-eating, winged humanoids
* Elbow Witch (Ojibwa) - Hags with awls in their elbows
* Eldjötnar (Norse) - Fire giant
* Eleionomae (Greek) - Marsh nymph
* Elemental (Alchemy) - Personification of one of the Classical elements
* ‘Elepaio (Hawaiian) - Monarch flycatcher spirit that guides canoe-builders to the proper trees
* Elf (Germanic) - Nature and fertility spirit
* Eloko (Central Africa) - Little people and malevolent nature spirits
* Emela-ntouka (Central Africa) - Gigantic, elephant-killing beast
* Emere (Yoruba) - Child that can move back and forth between the material world and the afterlife at will
* Emim (Jewish) - Giant
* Empusa (Greek) - Female demon that waylays travelers and seduces and kills men
* Encantado (Brazilian) - Dolphin-human shapeshifter
* Enchanted Moor (Portuguese) - Enchanted princesses
* Enenra (Japanese) - Monster made of smoke
* Enfield (Heraldic) - Fox-greyhound-lion-wolf-eagle hybrid
* Enkō (Japanese) - Kappa of Shikoku and western Honshū
* Epimeliad (Greek) - Apple tree nymph
* Erlking (Germanic) - Death spirit
* Erymanthian Boar (Greek) - Giant boar
* Ettin (English) - Three-headed giant
* Eurynomos (Greek) - Blue-black, carrion-eater in the underworld
* Ežerinis (Lithuanian) - Lake spirit
* Fachen (Irish and Scottish) - Monster with half a body
* Fæcce (Anglo-Saxon) - Animal protection spirit
* Fairy (Many cultures worldwide) - Nature spirits
* Familiar (English) - Animal servant
* Far darrig (Irish) - Little people that constantly play pranks
* Faun (Roman) - Human-goat hybrid nature spirit
* Fear gorta (Irish) - Hunger ghost
* Feathered Serpent - Mesoamerican dragon
* Fenghuang (Chinese) - Rooster-swallow-fowl-snake-goose-tortoise-stag-fish hybrid
* Fenodyree (Manx) - House spirit
* Fenrir (Norse) - Gigantic, ravenous wolf
* Fext (Slavic) - Undead
* Finfolk (Orkney) - Fish-human hybrid that kidnaps humans for servants
* Fir Bolg (Irish) - Ancestral race
* Fire Bird (Many cultures worldwide) - Regenerative, solar bird
* Firedrake (Germanic) - Dragon
* Fish-man (Cantabrian) - Amphibious, scaled humanoid
* Fomorian (Irish) - Goat-headed giant
* Fuath (Celtic) - Malevolent water spirit
* Fucanglong (Chinese) - Underworld dragon
* Funayūrei (Japanese) - Ghosts of people who drowned at sea
* Furu-utsubo (Japanese) - Animated jar
* Futakuchi-onna (Japanese) - Woman with a second mouth on the back of
her head
* Fylgja (Scandinavian) - Animal familiar

* Gaasyendietha (Seneca) - Dragon
* Gagana (Russian) - Bird with iron beak and copper talons
* Ga-gorib (Khoikhoi) - Anthropohagous monster
* Gagoze (Japanese) - Demon who attacked young priests at Gangō-ji temple
* Gaki (Japanese) - Ghosts of especially greedy people
* Gallu (Mesopotamian) - Underworld demons
* Galtzagorriak (Basque) - Diminutive, demonic servants
* Gamayun (Russian) - Prophetic bird with human head
* Gana (Hindu) - Attendants of Shiva
* Gancanagh (Irish) - Male fairy that seduces human women
* Gandaberunda (Hindu) - Double-headed bird
* Gandharva (Hindu) - Male nature spirits, often depicted as part human, part animal
* Gangi-kozō (Japanese) - Fish-eating water-monster
* Garappa (Japanese) - Kappa from Kyūshū
* Gargouille (French) - Water dragon
* Garmr (Norse) - Giant, ravenous wolf
* Garuda (Hindu) - Human-eagle hybrid
* Gashadokuro (Japanese) - Giant, malevolent skeletons
* Gaueko (Basque) - Wolf capable of walking upright
* Ged (Heraldic) - The fish pike
* Genie (Arabian) - Elemental spirit
* Genius loci (Roman) - Spirit that protects a specific place
* Geryon (Greek) - Giant with three heads, six arms, three torsos and (in some sources) six legs
* Ghillie Dhu (Scottish) - Tree guardian
* Ghost - Disembodied spirits, specifically of those that have died
* Ghoul (Arabian) - Earth genie. Also a shapeshifting desert anthropophagus
* Giant (mythology)
* Giant animal (mythology)
* Gichi-anami'e-bizhiw (Ojibwa) - Bison-snake-bird-cougar hybrid and water spirit
* Gidim (Sumerian) - Ghost
* Gigantes (Greek) - Race of giants that fought the Olympian gods, sometimes depicted with snake-legs
* Gigelorum (Scottish) - Smallest animal
* Girtablilu Akkadian) - Human-scorpion hybrid
* Glaistig (Scottish) - Human-goat hybrid
* Glashtyn (Manx - Malevolent water horse
* Gnome (Alchemy) - Diminutive Earth elemental
* Goblin (Medieval) - Grotesque, mischievous little people
* Gog (English) - Giant protector of London
* Gold-digging ant (Medieval Bestiaries) - Dog-sized ant that digs for gold in sandy areas
* Golem (Jewish) - Animated construct
* Gorgon (Greek) - Fanged, snake-haired humanoids that turn anyone who sees them into stone
* Goryō (Japanese) - Vengeful ghosts, usually of martyrs
* Gremlin (Folklore) - Goblins that sabotage airplanes
* Griffin (Heraldic) - Lion-eagle hybrid
* Grigori (Christian) - Fallen angels
* Grim (English and Scandinavian) - Tutelary spirits of churches
* Grindylow (English) - Malevolent water spirit
* Grine (Moroccan) - Genie duplicate of a person. Lives in a parallel world
* Gualichu (Mapuche) - Malevolent spirit
* Gud-elim (Akkadian) - Human-bull hybrid
* Guhin (Japanese) - Anthropomorphic bird
* Gulon (Germanic) - Gluttonous dog-cat-fox hybrid
* Gwyllgi - Welsh black dog
* Gwyllion (Welsh) - Malevolent spirit
* Gytrash - Lincolnshire and Yorkshire black dog
* Gyūki (Japanese) - Bull-headed monster
* Hacker (Scandinavian) - Primitive little people
* Hadhayosh (Persian) - Gigantic land animal
* Haetae (Korean) - Dog-lion hybrid
* Hag (Many cultures worldwide) - Wizened old woman, usually a malevolent spirit with this specific form, or a goddess in disguise
* Haietlik (Nuu-chah-nulth) - Water serpent
* Hai-uri (Khoikhoi) - Male, anthropohagous, partially invisible monster
* Hakutaku (Japanese) - Sheep-like animal
* Hākuturi (Māori) - Nature guardian
* Half-elf (Norse) - Hybrid of a human and an elf
* Haltija (Finnish) - Spirit that protects a specific place
* Hamadryad (Greek) - Oak tree nymph
* Hamingja (Scandinavian) - Personal protection spirit
* Hamsa (Buddhist, Hindu, and Jainism) - Mystical bird
* Hanau epe (Rapa Nui) - Long-eared humanoid
* Hantu Demon (Philippine) - Demon
* Hantu Raya (Malay) - Demonic servant
* Harionago (Japanese) - Humanoid female with barbed, prehensile hair
* Harpy (Greek) - Death spirit with the form of a bird with a human head
* Haugbui (Norse) - Undead who cannot leave its burial mound
* Havsrå (Norse) - Saltwater spirit
* Headless Mule (Brazilian) - Fire-spewing, headless, spectral mule
* Hecatonchires (Greek) - Primordial giants with 100 hands and fifty heads
* Heikegani (Japanese) - Crabs with human-faced shells, the spirits of the warriors killed in the Battle of Dan-no-ura
* Heinzelmännchen (German) - Household spirit
* Helead (Greek) - Fen nymph
* Hellhound (Many cultures worldwide) - Dog from underworld
* Hercinia (Medieval Bestiaries) - Glowing bird
* Herensuge (Basque) - Dragon
* Hesperides (Greek) - Nymph daughters of Atlas
* Hiderigami (Japanese) - Drought spirit
* Hieracosphinx (Ancient Egypt) - Falcon-headed sphinx
* Hihi (Japanese) - Baboon monster
* Hiisi (Finnish) - Nature guardian
* Hippocamp (Etruscan, Greek, and Phoenician) - Horse-fish hybrid
* Hippogriff (Medieval Bestiaries) - Hybrid of a griffon and horse, that is a lion-eagle-horse hybrid
* Hitodama (Japanese) - Ghosts of the newly dead, which take the form of fireballs
* Hitotsume-kozou (Japanese) - One-eyed little people
* Hob (English) - House spirit
* Hobgoblin (Medieval) - Friendly or amusing goblin
* Hōkō (Japanese) - Dog-like tree spirit from China
* Homa (Persian) - Eagle-lion hybrid, similar to a griffon
* Hombre Caiman (Colombian) - Human-alligator hybrid
* Hombre Gato (Latin America) - Human-cat hybrid
* Homunculus (Alchemy) - Diminutive, animated construct
* Hone-onna (Japanese) - Skeletal ghost that take the form of a young woman to seduce men
* Hō-ō (Japanese) - Rooster-swallow-fowl-snake-goose-tortoise-stag-fish hybrid
* Hoopoe - A near passerine bird common to Africa and Eurasia that features in many mythologies in those continents
* Horned Serpent (Native American) - Serpentine rain spirit
* Hotoke (Japanese) - Deceased person
* Houri (Islamic) - Heavenly beings
* Hrímþursar (Norse) - Frost Giant
* Huaychivo (Mayan) - Human-deer hybrid
* Huldra (Norse) - Forest spirit
* Huli jing (Chinese) - Nine-tailed fox spirit
* Huma (Persian) - Regenerative fire bird
* Humbaba (Akkadian) - Lion-faced giant
* Hundun (Chinese) - Chaos spirit
* Hyakume (Japanese) - Creature with a hundred eyes
* Hydra (Greek) - Multi-headed water serpent/dragon
* Hydros (Medieval Bestiary) - Snake whose poison causes the victim to swell up
* Hydrus (Medieval Bestiary) - Snake from the Nile River that would kill crocodiles from the inside
* Hyōsube (Japanese) - Hair-covered kappa
* Hyōtan-kozō (Japanese) - Gourd spirit
* Iara (Brazilian) - Female water spirit
* Ibong Adarna (Philippine) - Bird that changes color each time it finishes a song
* Ichimoku-nyūdō (Japanese) - One-eyed kappa from Sado Island
* Ichiren-Bozu (Japanese) - Animated prayer beads
* Ichneumon (Medieval Bestiaries) - Dragon-killing animal
* Ichthyocentaur (Greek) - Human-fish hybrid
* Iele (Romanian) - Female nature spirits
* Ifrit (Arabian) - Fire genie
* Ijiraq (Inuit) - Spirit that kidnaps children
* Ikiryō (Japanese) - Disembodied soul
* Ikuchi (Japanese) - Sea-serpent that travels over boats in an arc while dripping oil
* Iku-Turso (Finnish) - Sea monster
* Imp (Medieval) - Diminutive, demonic servant
* Impundulu (Southern Africa) - Avian, vampiric lightning spirit
* Imugi (Korean) - Flightless, dragon-like creatures (sometimes thought of as proto-dragons)
* Inapertwa (Aboriginal) - Simple organisms, used by creator-gods to make everything else
* Incubus (Medieval folklore) - Male night-demon and rapist
* Indrik (Russian) - One-horned horse-bull hybrid
* Inkanyamba (Zulu) - Horse-headed serpent
* Inugami (Japanese) - Dog spirit
* Ipotane (Greek) - Horse-human hybrid, two-legged (as opposed to the four-legged centaur)
* Ippon-datara (Japanese) - One-legged mountain spirit
* Iratxoak (Basque) - Diminutive, demonic servents
* Irin (Jewish) - Fallen angels
* Ishigaq (Inuit) - Little people
* Isonade (Japanese) - Shark-like sea monster
* Ittan-momen (Japanese) - Malevolent ghost
* Iwana-bōzu (Japanese) - Char which appeared as a Buddhist monk
Iara (Brazilian) - Female water spirit
* Ibong Adarna (Philippine) - Bird that changes color each time it finishes a song
* Ichimoku-nyūdō (Japanese) - One-eyed kappa from Sado Island
* Ichiren-Bozu (Japanese) - Animated prayer beads
* Ichneumon (Medieval Bestiaries) - Dragon-killing animal
* Ichthyocentaur (Greek) - Human-fish hybrid
* Iele (Romanian) - Female nature spirits
* Ifrit (Arabian) - Fire genie
* Ijiraq (Inuit) - Spirit that kidnaps children
* Ikiryō (Japanese) - Disembodied soul
* Ikuchi (Japanese) - Sea-serpent that travels over boats in an arc while dripping oil
* Iku-Turso (Finnish) - Sea monster
* Imp (Medieval) - Diminutive, demonic servant
* Impundulu (Southern Africa) - Avian, vampiric lightning spirit
* Imugi (Korean) - Flightless, dragon-like creatures (sometimes thought of as proto-dragons)
* Inapertwa (Aboriginal) - Simple organisms, used by creator-gods to make everything else
* Incubus (Medieval folklore) - Male night-demon and rapist
* Indrik (Russian) - One-horned horse-bull hybrid
* Inkanyamba (Zulu) - Horse-headed serpent
* Inugami (Japanese) - Dog spirit
* Ipotane (Greek) - Horse-human hybrid, two-legged (as opposed to the four-legged centaur)
* Ippon-datara (Japanese) - One-legged mountain spirit
* Iratxoak (Basque) - Diminutive, demonic servents
* Irin (Jewish) - Fallen angels
* Ishigaq (Inuit) - Little people
* Isonade (Japanese) - Shark-like sea monster
* Ittan-momen (Japanese) - Malevolent ghost
* Iwana-bōzu (Japanese) - Char which appeared as a Buddhist monk
* Kabouter (Dutch) - Little people that live underground, in mushrooms, or as house spirits
* Kachina (Hopi and Puebloan) - Nature spirit
* Kage-onna (Japanese) - Shadow of a woman cast on the paper doors of a haunted house
* Kahaku (Japanese) - Little people and water spirits
* Kajsa (Scandinavian) - Wind spirit
* Kalakeyas (Hindu) - Descendents of Kala
* Kallikantzaroi (Greek) - Grotesque, malevolent spirit
* Kamaitachi (Japanese) - Wind spirit
* Kami (Japanese) - Nature spirit
* Kamikiri (Japanese) - Hair-cutting spirit
* Kanbari-nyūdō (Japanese) - Bathroom spirit
* Kanbo (Japanese) - Drought spirit
* Kanedama (Japanese) - Money spirit
* Kappa (Japanese) - Little people and water spirits
* Kapre (Philippine) - Malevolent tree spirit
* Karakoncolos (Bulgarian and Turkish) - Troublesome spirit
* Karakura (Turkish) - Male night-demon
* Karasu-tengu (Japanese) - Tengu with a bird's bill
* Karkadann (Persian) - One-horned giant animal
* Karkinos (Greek) - Giant crab
* Karura (Japanese) - Eagle-human hybrid
* Karzełek (Polish) - Little people and mine spirits
* Kasa-obake (Japanese) - Animated parasol
* Kasha (Japanese) - Cat-like demon which descends from the sky and carries away corpses
* Kashanbo (Japanese) - Kappa who climb into the mountains for the winter
* Katawa-guruma (Japanese) - Woman riding on a flaming wheel
* Katsura-otoko (Japanese) - Handsome man from the moon
* Kaukas (Lithuanian) - Nature spirit
* Kawa-akago (Japanese) - Infant monster that lurks near rivers and drowns people
* Kawa-uso (Japanese) - Supernatural river otter
* Kawa-zaru (Japanese) - Smelly, cowardly water spirit
* Keelut (Inuit) - Hairless dog
* Kee-wakw (Abenaki) - Anthropophagous giant
* Kekkai (Japanese) - Amorphous afterbirth spirit
* Kelpie (Irish and Scottish) - Malevolent water horse
* Kerakera-onna (Japanese) - Giant, cackling woman who appears in the sky
* Kesaran-pasaran (Japanese) - Mysterious, white, fluffy creature
* Keukegen (Japanese) - Disease spirit
* Keythong (Heraldic) - Wingless griffin
* Khalkotauroi (Greek) - Bronze-hoofed bulls
* Kigatilik (Inuit) - Night-demon
* Kijimunaa (Japanese) - Tree sprite from Okinawa
* Kijo (Japanese) - She-devil
* Kikimora (Slavic) - Female house spirit
* Kinnara (Hindu) - Human-bird hybrid
* Kishi (Angola) - Malevolent, two-faced seducer
* Kitsune (Japanese) - Fox spirit
* Kitsune-Tsuki (Japanese) - Person possessed by a fox spirit
* Kiyohime (Japanese) - Woman who transformed into a serpent-demon out of the rage of unrequited love
* Klabautermann (German) - Ship spirit
* Knocker (folklore) (Cornish and Welsh) - Little people and mine spirits
* Knucker (English) - Water dragon
* Kobalos (Greek) - Shape-shifting thieves and tricksters
* Kobold (German) - Little people and mine or house spirits
* Kodama (Japanese) - Tree spirit
* Kofewalt (Germanic) - House spirit
* Ko-gok (Abenaki) - Hideous monster
* Kokakuchō (Japanese) - Ubume bird
* Koma-inu (Japanese) - Protective animal
* Konaki-Jijii (Japanese) - Infant that cries until it is picked up, then increases its weight and crushes its victim
* Kongamoto (Congo) - Flying creature
* Konoha-tengu (Japanese) - Anthropomorphic bird
* Koro-pok-guru (Ainu) - Little people
* Korrigan (Breton) - Little people and nature spirits
* Kosode-no-te (Japanese) - Short-sleeved kimono with its own hands
* Kraken (Scandinavian) - Sea monster
* Krasnoludek (Slavic) - Little people nature spirits
* Kuarahy Jára (Guaraní) - Forest spirit
* Kubikajiri (Japanese) - Headless ghost
* Kuchisake-Onna (Japanese) - Vengeful ghost of a woman mutilated by her husband
* Kuda-gitsune (Japanese) - Miniature fox spirit
* Kudan (Japanese) - Human-faced calf which predicts a calamity and then dies
* Kui (Chinese) - One-legged monster
* Kulshedra (Albanian) - Drought-causing dragon
* Kumakatok (Philippine) - Death spirits
* Kumiho (Korean) - Fox spirit
* Kun (Chinese) - Giant fish
* Kupua (Hawaiian) - Shapeshifting tricksters
* Kurabokko (Japanese) - Guardian spirit of a warehouse
* Kurage-no-hinotama (Japanese) - Jellyfish which floats through the air as a fireball
* Kurupi (Guaraní) - Wild man and fertility spirit
* Kushtaka (Tlingit) - Shapeshifting otter spirit
* Kye-ryong (Korean) - Chicken-lizard hybrid
* Kyōkotsu (Japanese) - Ghost of a corpse discarded in a well
* Kyourinrin (Japanese) - Animated scroll or paper
* Kyūbi-no-kitsune (Japanese) - Nine-tailed fox
* Kyūketsuki (Japanese) - Vampire
A statue of Rangda, the queen of the Leyak.
A statue of Rangda, the queen of the Leyak.

* La-bar-tu (Assyrian) - Disease demon
* Labbu (Akkadian) - Sea snake
* La chusa (Spanish) - Death spirit
* Lady midday (Slavic) - Sunstroke spirit
* Lakanica (Slavic) - Field spirit
* Lake monster (Worldwide) - Gigantic animals reputed to inhabit various lakes around the world
* La Llorona (Latin America) - Death spirit associated with drowning
* Lambton Worm (English) - Giant worm (possibly a dragon)
* Lamia (Greek) - Child-devouring monster
* Lamiak (Basque) - Water spirit with bird feet
* Lammasu (Akkadian and Sumerian) - Protective spirit with the form of a winged bull or lion with a human head
* La Mojana (Colombian) - Shapeshifting, female water spirit
* Lampades (Greek) - Underworld nymph
* Landvættir (Norse) - Nature spirits
* Lares (Roman) - House spirit
* La Sayona (Venezuela) - Female ghost that punishes unfaithful husbands
* La Tunda (Colombian) - Nature spirit that seduces and kills men
* Laukų dvasios (Lithuanian) - Field spirit
* Lauma (Baltic) - Sky spirit
* Lavellan (Scottish) - Gigantic water rat
* Leanashe (Irish) - Possessing spirit or vampire
* Leimakids (Greek) - Meadow nymph
* Lenanshee (Celtic) - Fairy lover
* Leokampoi (Etruscan) - Fish-tailed lion
* Leontophone (Medieval Bestiary) - Tiny animal poisonous to lions
* Leprechaun (Irish) - Cobbler spirit
* Leszi (Slavic) - Tree spirit
* Leuce (Greek) - White poplar tree nymph
* Leucrota (Medieval Bestiary) - Hybrid of a lion and crocotta
* Leviathan (Jewish) - Sea monster
* Leyak (Balinese) - Anthropophagous flying head with entrails
* Lidérc (Hungary) - Magical chicken that transforms into a humanoid
* Lightning Bird (Southern Africa) - Magical bird that can be found at sites of lightning strikes
* Likho (Slavic) - One-eyed hag or goblin
* Lilin (Jewish) - Night-demoness
* Lilitu (Assyrian) - Winged demon
* Limnades (Greek) - Lake nymph
* Lindworm (Germanic) - Dragon
* Lizardman (Global) - Human-lizard hybrid
* Ljósálfar (Norse) - Sunlight spirit
* Llamhigyn Y Dwr (Welsh) - Frog-bat-lizard hybrid
* Lo-lol (Abenaki) - Hideous monster
* Lóng - Chinese dragon
* Long Ma (Chinese) - Dragon-horse hybrid
* Loogaroo (French America) - Shapeshifting, female vampire
* Lou Carcolh (French) - Snake-mollusk hybrid
* Lubber fiend (English) - House spirit
* Luduan (Chinese) - Truth-detecting animal
* Luison (Guaraní) - Death spirit
* Lutin (French) - Amusing goblin
* Lynx (Medieval Bestiaries) - Feline guide spirit
* Maa-alused (Estonian) - Subterranean spirit
* Maal (Bangladesh) - Malevolent water spirit
* Madremonte (Colombian) - Nature guardian
* Maero (Māori) - Savage, arboreal humanoids
* Magog (English) - Giant protector of London
* Maha-pudma (Hindu) - Giant elephant that holds up the world
* Maikubi (Japanese) - Quarreling heads of three dead miscreants
* Mairu (Basque) - Megalith-building giant
* Mājas gari (Latvian) - Benevolent house spirit
* Majin (Japanese) - Magical beings
* Makara (Indian) - Aquatic beings
* Makura-gaeshi (Japanese) - Pillow-moving spirit
* Mami Wata (Africa and the African diaspora) - Supernaturally beautiful water spirits
* Manananggal (Philippine) - Vampires that sever their torsos from their legs to fly around
* Mandrake (Medieval folklore) - Diminutive, animated construct
* Manes (Roman) - Ancestral spirits
* Mannegishi (Cree) -Little people with six fingers and no noses
* Manticore (Persian) - Lion-human-scorpion hybrid
* Mapinguari (Brazilian) - Giant sloth
* Mara (Scandinavian) - Female night-demon
* Mareikura (Tuamotu) - Attendant of Kiho-tumu, the supreme god
* Mares of Diomedes (Greek) - Man-eating horses
* Marid (Arabian) - Water genie
* Maro deivės (Lithuanian) - Disease spirits
* Maski-mon-gwe-zo-os (Abenaki) - Shapeshifting toad spirit
* Matagot (French) - Spirit that takes animal form, usually a black cat
* Mayura (Hindu) - Peacock spirit
* Mazikeen (Jewish) - Invisible, malevolent spirit
* Mbói Tu'ĩ (Guaraní) - Snake-parrot hybrid
* Mbwiri (Central Africa) - Possessing demon
* Mekurabe (Japanese) - Multiplying skulls that menaced Taira no Kiyomori in his courtyard
* Meliae (Greek) - Ash tree nymph
* Melusine (Medieval folklore) - Female water spirit, with the form of a winged mermaid
* Menehune (Hawaiian) - Little people and craftsmen
* Menninkäinen (Finnish) - Little people and nature spirits
* Merfolk (Worldwide) - Human-fish hybrid
* Merlion (Singapore) - Combination of a lion and a fish, the symbol of Singapore.
* Merrow (Irish and Scottish) - Human-fish hybrid
* Metee-kolen-ol (Abenaki) - Ice-hearted wizards
* Miage-nyūdō (Japanese) - Spirit which grows as fast as you can look up at it
* Mikoshi-nyūdō(Japanese) (Japanese) - Spirit which grows as fast as you can look up at it
* Mimi (Australian Aboriginal) - Extremely elongated humanoid that has to live in rock crevasses to avoid blowing away
* Minka Bird (Australian Aboriginal) - Death spirit
* Minotaur (Greek) - Human-bull hybrid
* Mishibizhiw (Ojibwa) - Feline water spirit
* Misi-ginebig (Ojibwa) - Serpentine rain spirit
* Misi-kinepikw (Cree) - Serpentine rain spirit
* Mizuchi (Japanese) - Water dragon
* Mohan (Latin America) - Nature spirit
* Mokoi (Australian Aboriginal) - Malevolent spirit that kills sorcerers
* Mokumokuren (Japanese) - Spirits that live in torn shōji
* Momonjii (Japanese) - Old man that meets victims at the fork of every road
* Moñái (Guaraní) - Giant snake with antennae
* Monocerus (Medieval Bestiary) - One-horned stag-horse-elephant-boar hybrid, sometimes treated as distinct from the unicorn
* Mono Grande (South America) - Giant monkey
* Monopod (Medieval Bestiaries) - Dwarf with one, giant foot
* Mora (Slavic) - Disembodied spirit
* Morgens (Breton and Welsh) - Water spirits
* Morinji-no-okama (Japanese) - Animated tea kettle
* Mormolykeia (Greek) - Underworld spirit
* Moroi (Romanian) - Vampiric ghost
* Mōryō (Japanese) - Long-eared, corpse-eating spirit
* Moss people (Germanic) - Little people and tree spirits
* Mountain Giant (Norse) - Giant
* Mujina (Japanese) - Shapeshifting badger spirit
* Mula Retinta (Colombian) - Malevolent storm spirit that takes the form of a mule
* Muldjewangk (Australian Aboriginal) - Water monster
* Muma Pădurii (Romanian) - Forest-dwelling hag
* Muscaliet (Medieval Bestiary) - Extremely hot hare-squirrel-boar hybrid
* Muse (Greek) - Spirits that inspire artists
* Myling (Scandinavian) - Ghosts of unbaptized children
* Myōbu (Japanese) - Fox spirit
* Myrmecoleon (Medieval Bestiaries) - Ant-lion hybrid
A Hoysala sculpture of a Naga couple. Halebidu.
A Hoysala sculpture of a Naga couple. Halebidu.

* Nachzehrer (German) - Anthropophagous undead
* Nāga (Buddhist and Hindu) - Nature and water spirits, serpentine or human-serpent hybrids
* Naga fireballs (Thai) - Spectral fire
* Nagual (Mesoamerica) - Human-animal shapeshifter
* Naiad (Greek) - Freshwater nymph
* Näkki (Finnish) - Water spirit
* Namahage (Japanese) - Ritual disciplinary demon from the Oga Peninsula
* Namazu (Japanese) - Giant catfish whose thrashing causing earthquakes
* Nando-baba (Japanese) - Old woman who hides under the floor in abandoned storerooms
* Nanom-keea-po-da (Abenaki) - Earthquake spirit
* Napaeae (Greek) - Grotto nymph
* Narecnitsi (Slavic) - Fate spirit
* Naree Pons (Thai) - Pod people
* Nargun (Gunai) - Water monster
* Narikama (Japanese) - Kettle spirit
* Nasnas (Arabian) - Half-human, half-demon creature with half a body
* Nav' (Slavic) - Ghost
* Nawao (Hawaiian) - Savage humanoid
* N-dam-keno-wet (Abenaki) - Fish-human hybrid
* Nebutori (Japanese) - Mystical disease which causes women to grow fat and lethargic
* Negret (Catalan) - Little people that turn into coins
* Nekomata (Japanese) - Split-tailed magical cat
* Nekomusume (Japanese) - Cat in the form of a girl
* Nemean Lion (Greek) - Lion with impenetrable skin
* Nephilim (Jewish) - Giant
* Nereid (Greek) - Nymph daughters of Nereus
* Ngen (Mapuche) - Nature spirit
* Nguruvilu (Mapuche) - Fox-like water snake
* Nian (Chinese) - Predatory animal
* Nightmarchers (Hawaiian) - Warrior ghosts
* Nikusui (Japanese) - Monster which appears as a young woman and sucks all of the flesh off of its victim's body
* Nimerigar (Shoshone) - Aggressive little people
* Ningyo (Japanese) - Monkey-fish hybrid
* Ninki Nanka (Western Africa) - Large reptile, possibly a dragon
* Nisse (Scandinavian) - House spirit
* Níðhöggr (Norse) - Dragon
* Nivatakavachas (Hindu) - Ocean demon
* Nix (Germanic) - Female water spirit
* Nobusuma (Japanese) - Supernatural wall. Also a monstrous flying squirrel
* Nocnitsa (Slavic) - Nightmare spirit
* Noppera-bō (Japanese) - Faceless ghost
* Nozuchi (Japanese) - Small sea serpent
* Nuckelavee (Scottish) - Malevolent human-horse-fish hybrid
* Nue (Japanese) - Monkey-raccoon dog-tiger-snake hybrid
* Nukekubi (Japanese) - Disembodied, flying head that attacks people
* Nuku-mai-tore (Māori) - Forest spirit
* Numen (Roman) - Tutelary spirit
* Nuno (Philippine) - Malevolent little people
* Nuppefuhofu (Japanese) - Animated lump of decaying human flesh
* Nuppeppo (Japanese) - Animated chuck of dead flesh
* Nurarihyon (Japanese) - Creature who sneaks into houses on busy evenings
* Nure-onna (Japanese) - Female monster who appears on the beach
* Nuribotoke (Japanese) - Animated corpse with blackened flesh and dangling eyeballs
* Nurikabe (Japanese) - Spirit that manifests as an endless wall
* Nykštukas (Lithuanian) - Cavern spirit
* Nymph (Greek) - Nature spirit
* Nyūbachibō (Japanese) - Mortar spirit
# Obake (Japanese) - Shapeshifting spirits
# Obariyon (Japanese) - Spook which rides piggyback on a human victim and becomes unbearably heavy
# Obayifo (Ashanti) - Vampiric possession spirit
# Obia (West Africa) - Gigantic animal that serves witches
# Oboro-guruma (Japanese) - Ghostly oxcart with the face of its driver
# Oceanid (Greek) - Nymph daughters of Oceanus
# Odei (Basque) - Storm spirit
# Odmience (Slavic) - Changeling
# Og (Jewish) - Giant king of the Amorites
# Ogre (Medieval folklore) - Large, grotesque humanoid
# Ohaguro-bettari (Japanese) - Female ghost lacking all facial features save for a large, black-toothed smile
# Oiwa (Japanese) - Ghost of a woman with a distorted face who was murdered by her husband
# Ōkamuro (Japanese) - Giant face which appears at the door
# Okiku (Japanese) - Plate-counting ghost of a servant girl
# Ōkubi (Japanese) - Death spirit
# Okuri-inu (Japanese) - Dog or wolf that follows travelers at night. Similar to the Black dog of English folklore
# Ōmukade (Japanese) - Giant, human-eating centipede that lives in the mountains
# Oni (Japanese) - Large, grotesque humanoid
# Onibi (Japanese) - Spectral fire
# Onikuma (Japanese) - Monstrous bear
# Onmoraki (Japanese) - Bird-demon created from the spirits of freshly-dead corpses
# Onocentaur (Medieval Bestiaries) - Human-donkey hybrid
# Onoskelis (Greek) - Shapeshifting demon
# Onryō (Japanese) - Vengeful ghost that manifests in physical (rather than spectral) form
# Onza (Aztec and Latin American folklore) - Wild cat, possibly a subspecies of cougar
# Oozlum bird (Unknown origin) - Bird that flies backwards
# Ophiotaurus (Greek) - Bull-serpent hybrid
# Opinicus (Heraldic) - Lion-eagle hybrid, similar to a griffin, but with leonine forelimbs
# Orang Bunian (Malay) - Forest spirit
# Orang Minyak (Malay) - Spectral rapist
# Ördög (Hungarian) - Shapeshifting demon
# Oread (Greek) - Mountain nymph
# Ork (Tyrolean) - Little people and house spirits
# Orobas (European) - Horse-headed, honest oracle classed as a demon
# Orphan Bird (Medieval Bestiaries) - Peacock-eagle-swan-crane hybrid
# Orthrus (Greek) - Two-headed dog
# Otoroshi (Japanese) - Hairy creature that perches on the gates to shrines and temples
# Otso (Finnish) - Bear spirit
# Ouroboros (Worldwide) - Mystic serpent/dragon that eats its own tail
# Ovinnik (Slavic) - Malevolent threshing house spirit

A modern painting of the "Piasa Bird", on the bluffs of the Mississippi River in Alton. Wings were not present in the original painting.
A modern painting of the "Piasa Bird", on the bluffs of the Mississippi River in Alton. Wings were not present in the original painting.

* Paasselkä devils (Finnish) - Spectral fire
* Pamola (Abenaki) - Weather spirit
* Panes (Greek) - Human-goat hybrids descended from the god Pan
* Panis (Hindu) - Demons with herds of stolen cows
* Panlong (Chinese) - Water dragon
* Panotti (Medieval Bestiaries) - Humanoid with gigantic ears
* Panther (Medieval Bestiaries) - Feline with sweet breath
* Parandrus (Medieval Bestiaries) - Shapeshifting animal whose natural form was a large ruminant
* Pard (Medieval Bestiaries) - Fast, spotted feline believed to mate with lions to produce leopards
* Pardalokampoi (Etruscan) - Fish-tailed panther
* Patagon (Medieval folklore) - Giant race reputed to live in the area of Patagonia
* Patasola (Latin America) - Anthropophagous, one-legged humanoid
* Patupairehe (Māori) - White-skinned nature spirits
* Pech (Scottish) - Strong little people
* Pegaeae (Greek) - Spring nymph
* Pelesit (Malay) - Servant spirit
* Peluda (French) - Dragon
* Penanggalan (Philippine) - Vampires that sever their heads from their bodies to fly around, usually with their intestines or other internal organs trailing behind
* Peng (Chinese) - Giant bird
* Penghou (Chinese) - Tree spirit
* Peri (Persian) - Winged humanoid
* Peryton (Allegedly Medieval folklore) - Deer-bird hybrid
* Pesanta (Catalan) - Nightmare demon in the form of a cat or dog
* Peuchen (Chilota and Mapuche) - Vampiric, flying, shapeshifting serpent
* Phoenix (Phoenician) - Regenerative bird
* Piasa (Native American) - Winged, antlered feline
* Piatek (Armenian) - Large land animal
* Pictish Beast (Pictish stones) - Stylistic animal, possibly a dragon
* Pillan (Mapuche) - Nature spirit
* Pim-skwa-wagen-owad (Abenaki) - Water spirit
* Piru (Finnish) - Minor demon
* Pishacha (Hindu) - Carrion-eating demon
* Pita-skog (Abenaki) - Serpentine rain spirit
* Pixie (Cornish) - Little people and nature spirits
* Pixiu (Chinese) - Winged lion
* Pi yao (Chinese) - Horned, dragon-lion hybrid
* Plakavac (Slavic) - Vampire created when a mother strangles her child
* Pok-wejee-men (Abenaki) - Tree spirit
* Polevik (Polish) - Little people and field spirits
* Pollo Maligno (Colombian) - Canibbalistic chicken spirit
* Polong (Malay) - Invisible servant spirit
* Poltergeist (German) - Ghost that moves objects
* Pombero (Guaraní) - Wild man and nature spirit
* Ponaturi (Māori) - Grotesque, malevolent humanoid
* Pontianak (Malay) - Undead, vampiric women who died in childbirth
* Poukai (Māori) - Giant bird
* Preta (Buddhist, Hindu, and Jainist) - Ghosts of especially greedy people
* Pricolici (Romanian) - Undead wolf
* Psotnik (Slavic) - Mischievous spirit
* Pterippus (Greek) - Winged horse
* Púca (Welsh) - Shapeshifting animal spirit
* Puck (English) - House spirit
* Pugot (Philippine) - Headless humanoid
* Pūķis (Latvian) - Malevolent house spirit
* Pygmy (Greek) - Little people
* Pyrausta (Greek) - Insect-dragon hybrid
* Python (Greek) - Serpentine dragon
* Qareen (Islamic) - Personal demon
* Qilin (Chinese) - Dragon-ox-deer hybrid
* Qiqirn (Inuit) - Large, bald dog spirit
* Qliphoth (Jewish) - Evil spirits
* Questing Beast (Arthurian legend) - Serpent-leopard-lion-hart hybrid
* Quinotaur (Frankish) - Five-horned bull
* Rå (Norse) - Spirit that protects a specific place
* Rabisu (Akkadian) - Vampiric spirit that ambushes people
* Ragana (Lithuanian) - Malevolent wizard
* Raiju (Japanese) - Lightning spirit
* Rain Bird (Native American) - Rain spirit
* Rainbow crow (Lenape) - Crow spirit
* Rainbow Fish (Hindu) - Whale-sized, multi-colored fish
* Rainbow Serpent (Australian Aboriginal) - Dragon
* Rakshasa (Buddhist and Hindu) - Shapeshifting demons
* Ramidreju (Spanish) - Extremely long, weasel-like animal
* Raróg (Slavic) - Whirlwind spirit
* Raven Mocker (Cherokee) - Life-draining spirit
* Raven Spirit (Native American, Norse, and Siberian) - Trickster spirit
* Redcap (English) - Malevolent, grotesque humanoid
* Re’em (Jewish) - Gigantic land animal
* Rephaite (Jewish) - Giant
* Revenant (Medieval folklore) - Reanimated dead
* Roc (Arabian and Persian) - Gigantic bird
* Rokurokubi (Japanese) - Long-necked, humanoid tricksters
* Rompo (Africa and India) - Skeletal creature with elements of a rabbit, badger, and bear
* Rồng - (Vietnamese) Dragon
* Rougarou (French America) - Human-wolf shapeshifter
* Rusalka (Slavic) - Female water spirit
* Ryū - Japanese dragon
Saci Pererê
Saci Pererê

* Saci (Brazilian) - One-legged nature-spirit
* Sagari (Japanese) - Horse's head that dangles from trees on Kyūshū
* Sakabashira (Japanese) - Haunted pillar, installed upside-down
* Salamander (Alchemy) - Fire elemental
* Samebito (Japanese) - Shark demon
* Samodiva (Slavic) - Nature spirit
* Sandwalker (Arabian) - Camel-stealing, giant arthropod
* Sânziană (Romanian) - Nature spirit
* Sarimanok (Philippine) - Bird of good fortune
* Sarngika (Hindu) - Bird spirit
* Sarugami (Japanese) - Wicked monkey spirit which was defeated by a dog
* Satori (Japanese) - Mind-reading humanoid
* Satyr (Greek) - Human-goat hybrid and fertility spirit
* Sazae-oni (Japanese) - Shapeshifting turban snail spirit
* Sceadugenga (English) - Shapeshifting undead
* Scitalis (Medieval Bestiaries) - Snake which mesmerizes its prey
* Scorpion Man (Mayan and Sumerian) - Human-scorpion hybrid
* Scylla (Greek) - Human-snake-wolf hybrid with a snake's tail, twelve wolf legs, and six long-necked wolf heads
* Sea-bee (Heraldic) - Fish-tailed bee
* Sea monk (Medieval folklore) - Fish-like humanoid
* Sea monster (Worldwide) - Giant, marine animals
* Sea serpent (Worldwide) - Serpentine sea monster
* Sea-Wyvern (Heraldic) - Fish-tailed wyvern
* Seko (Japanese) - Water spirit which can be heard making merry at night
* Selkie (Faroese, Icelandic, Irish, and Scottish) - Human-seal shapeshifter
* Senpoku-Kanpoku (Japanese) - Human-faced frog which guides the souls of the newly deceased to the graveyard
* Seps (Medieval Bestiaries) - Snake with highly corrosive venom
* Serpent (Worldwide) - Snake spirit
* Serpopard (Ancient Egypt) - Serpent-leopard hybrid
* Setotaishō (Japanese) - Warrior composed of discarded earthenware
* Shachihoko (Japanese) - Tiger-carp hybrid
* Shade (Worldwide) - Spiritual imprint
* Shahbaz (Persian) - Giant eagle or hawk
* Shang-Yang (Chinese) - Rain bird
* Shedim (Jewish) - Chicken-legged demon
* Shedu (Akkadian and Sumerian) - Protective spirit with the form of a winged bull or lion with a human head
* Shellycoat (Scottish) - Water spirit
* Shenlong (Chinese) - Weather dragon
* Shibaten (Japanese) - Water spirit from Shikoku
* Shikigami (Japanese) - Child-sized servant spirit
* Shiki-ōji (Japanese) - Child-sized servant spirit
* Shikome (Japanese) - Underworld hag
* Shin (Japanese) - Giant clam which creates mirages
* Shiro-bōzu (Japanese) - White, faceless spirit
* Shirouneri (Japanese) - Animated mosquito netting or dust cloth
* Shiryō (Japanese) - Spirit of a dead person
* Shisa (Japanese) - Lion-dog hybrid
* Shishi (Chinese) - Protective animal
* Shōjō (Japanese) - Red-haired sea-sprites who love alcohol
* Shōkera (Japanese) - Creature that peers in through skylights
* Shtriga (Albanian) - An evil or dangerous witch
* Shunoban (Japanese) - Red-faced ghoul
* Shuten-dōji (Japanese) - Oni
* Sídhe - (Irish and Scottish) - Ancestral or nature spirit
* Sigbin (Philippine) - Goat-like vampire
* Silenoi (Greek) - Bald, fat, thick-lipped, and flat-nosed followers of Dionysus
* Simargl (Slavic) - Winged dog
* Simurgh (Persian) - Dog-lion-peacock hybrid
* Singa (Batak) - Feline animal
* Sint Holo (Choctaw) - Serpentine rain spirit
* Siren (Greek) - Human-headed bird
* Sirin (Slavic) - Demonic human-headed bird
* Sirrush (Akkadian) - Dragon with aquiline hind legs and feline forelegs
* Sisiutl (Native American) - Two-headed sea serpent
* Si-Te-Cah (Paiute) - Red-haired giants
* Sjörå (Norse) - Freshwater spirit
* Sjövættir (Norse) - Sea spirit
* Skin-walker (Native American and Norse) - Animal-human shapeshifter
* Skogsrå (Scandinavian) - Forest spirit
* Skookum (Chinook Jargon) - Hairy giant
* Skrzak (Slavic) - Flying imp
* Sky Women (Polish) - Weather spirit
* Sluagh (Irish and Scottish) - Restless ghost
* Sodehiki-kozō (Japanese) - Invisible spirit which pulls on sleeves
* Sōgenbi (Japanese) - Fiery ghost of an oil-stealing monk
* Soragami (Japanese) - Ritual disciplinary demon
* Soraki-gaeshi (Japanese) - Sound of trees being cut down, when later none seem to have been cut
* Sorobanbōzu (Japanese) - Ghost with an abacus
* Sōtangitsune (Japanese) - Fox spirit from Kyoto
* Soucouyant (Trinidad and Tobago) - Vampiric hag who takes the form of a fireball at night
* Spectre (Worldwide) - Terrifying ghost
* Sphinx (Greek) - Winged lion with a woman's head
* Spiriduş (Romanian) - Little people
* Spriggan (Cornish) - Guardians of graveyards and ruins
* Sprite (English) - Winged little people
* Strigoi (Romanian) - Vampire
* Strix (Roman) - Vampiric bird
* Strzyga (Slavic) - Vampiric undead
* Stuhać (Slavic) - Malevolent mountain spirit
* Stymphalian Bird (Greek) - Metallic bird
* Suangi (New Guinea) - Anthropophagous sorcerer
* Succubus (Medieval folklore) - Female night-demon
* Sudice (Slavic) - Fortune spirit
* Sunakake-baba (Japanese) - Sand-throwing hag
* Sunekosuri (Japanese) - Small dog- or cat-like creature that rubs against a person's legs at night
* Suppon-no-yūrei (Japanese) - Ghost with a face like a soft-shelled turtle
* Surma (Finnish) - Hellhound
* Svartálfar (Norse) - Cavern spirit
* The Swallower (Ancient Egyptian) - Crocodile-leopard-hippopotamus hybrid
* Swan maiden (Worldwide) - Swan-human shapeshifter
* Sylph (Alchemy) - Air elemental
* Iara (Brazilian) - Female water spirit
* Ibong Adarna (Philippine) - Bird that changes color each time it finishes a song
* Ichimoku-nyūdō (Japanese) - One-eyed kappa from Sado Island
* Ichiren-Bozu (Japanese) - Animated prayer beads
* Ichneumon (Medieval Bestiaries) - Dragon-killing animal
* Ichthyocentaur (Greek) - Human-fish hybrid
* Iele (Romanian) - Female nature spirits
* Ifrit (Arabian) - Fire genie
* Ijiraq (Inuit) - Spirit that kidnaps children
* Ikiryō (Japanese) - Disembodied soul
* Ikuchi (Japanese) - Sea-serpent that travels over boats in an arc while dripping oil
* Iku-Turso (Finnish) - Sea monster
* Imp (Medieval) - Diminutive, demonic servant
* Impundulu (Southern Africa) - Avian, vampiric lightning spirit
* Imugi (Korean) - Flightless, dragon-like creatures (sometimes thought of as proto-dragons)
* Inapertwa (Aboriginal) - Simple organisms, used by creator-gods to make everything else
* Incubus (Medieval folklore) - Male night-demon and rapist
* Indrik (Russian) - One-horned horse-bull hybrid
* Inkanyamba (Zulu) - Horse-headed serpent
* Inugami (Japanese) - Dog spirit
* Ipotane (Greek) - Horse-human hybrid, two-legged (as opposed to the four-legged centaur)
* Ippon-datara (Japanese) - One-legged mountain spirit
* Iratxoak (Basque) - Diminutive, demonic servents
* Irin (Jewish) - Fallen angels
* Ishigaq (Inuit) - Little people
* Isonade (Japanese) - Shark-like sea monster
* Ittan-momen (Japanese) - Malevolent ghost
* Iwana-bōzu (Japanese) - Char which appeared as a Buddhist monk
* Kabouter (Dutch) - Little people that live underground, in mushrooms, or as house spirits
* Kachina (Hopi and Puebloan) - Nature spirit
* Kage-onna (Japanese) - Shadow of a woman cast on the paper doors of a haunted house
* Kahaku (Japanese) - Little people and water spirits
* Kajsa (Scandinavian) - Wind spirit
* Kalakeyas (Hindu) - Descendents of Kala
* Kallikantzaroi (Greek) - Grotesque, malevolent spirit
* Kamaitachi (Japanese) - Wind spirit
* Kami (Japanese) - Nature spirit
* Kamikiri (Japanese) - Hair-cutting spirit
* Kanbari-nyūdō (Japanese) - Bathroom spirit
* Kanbo (Japanese) - Drought spirit
* Kanedama (Japanese) - Money spirit
* Kappa (Japanese) - Little people and water spirits
* Kapre (Philippine) - Malevolent tree spirit
* Karakoncolos (Bulgarian and Turkish) - Troublesome spirit
* Karakura (Turkish) - Male night-demon
* Karasu-tengu (Japanese) - Tengu with a bird's bill
* Karkadann (Persian) - One-horned giant animal
* Karkinos (Greek) - Giant crab
* Karura (Japanese) - Eagle-human hybrid
* Karzełek (Polish) - Little people and mine spirits
* Kasa-obake (Japanese) - Animated parasol
* Kasha (Japanese) - Cat-like demon which descends from the sky and carries away corpses
* Kashanbo (Japanese) - Kappa who climb into the mountains for the winter
* Katawa-guruma (Japanese) - Woman riding on a flaming wheel
* Katsura-otoko (Japanese) - Handsome man from the moon
* Kaukas (Lithuanian) - Nature spirit
* Kawa-akago (Japanese) - Infant monster that lurks near rivers and drowns people
* Kawa-uso (Japanese) - Supernatural river otter
* Kawa-zaru (Japanese) - Smelly, cowardly water spirit
* Keelut (Inuit) - Hairless dog
* Kee-wakw (Abenaki) - Anthropophagous giant
* Kekkai (Japanese) - Amorphous afterbirth spirit
* Kelpie (Irish and Scottish) - Malevolent water horse
* Kerakera-onna (Japanese) - Giant, cackling woman who appears in the sky
* Kesaran-pasaran (Japanese) - Mysterious, white, fluffy creature
* Keukegen (Japanese) - Disease spirit
* Keythong (Heraldic) - Wingless griffin
* Khalkotauroi (Greek) - Bronze-hoofed bulls
* Kigatilik (Inuit) - Night-demon
* Kijimunaa (Japanese) - Tree sprite from Okinawa
* Kijo (Japanese) - She-devil
* Kikimora (Slavic) - Female house spirit
* Kinnara (Hindu) - Human-bird hybrid
* Kishi (Angola) - Malevolent, two-faced seducer
* Kitsune (Japanese) - Fox spirit
* Kitsune-Tsuki (Japanese) - Person possessed by a fox spirit
* Kiyohime (Japanese) - Woman who transformed into a serpent-demon out of the rage of unrequited love
* Klabautermann (German) - Ship spirit
* Knocker (folklore) (Cornish and Welsh) - Little people and mine spirits
* Knucker (English) - Water dragon
* Kobalos (Greek) - Shape-shifting thieves and tricksters
* Kobold (German) - Little people and mine or house spirits
* Kodama (Japanese) - Tree spirit
* Kofewalt (Germanic) - House spirit
* Ko-gok (Abenaki) - Hideous monster
* Kokakuchō (Japanese) - Ubume bird
* Koma-inu (Japanese) - Protective animal
* Konaki-Jijii (Japanese) - Infant that cries until it is picked up, then increases its weight and crushes its victim
* Kongamoto (Congo) - Flying creature
* Konoha-tengu (Japanese) - Anthropomorphic bird
* Koro-pok-guru (Ainu) - Little people
* Korrigan (Breton) - Little people and nature spirits
* Kosode-no-te (Japanese) - Short-sleeved kimono with its own hands
* Kraken (Scandinavian) - Sea monster
* Krasnoludek (Slavic) - Little people nature spirits
* Kuarahy Jára (Guaraní) - Forest spirit
* Kubikajiri (Japanese) - Headless ghost
* Kuchisake-Onna (Japanese) - Vengeful ghost of a woman mutilated by her husband
* Kuda-gitsune (Japanese) - Miniature fox spirit
* Kudan (Japanese) - Human-faced calf which predicts a calamity and then dies
* Kui (Chinese) - One-legged monster
* Kulshedra (Albanian) - Drought-causing dragon
* Kumakatok (Philippine) - Death spirits
* Kumiho (Korean) - Fox spirit
* Kun (Chinese) - Giant fish
* Kupua (Hawaiian) - Shapeshifting tricksters
* Kurabokko (Japanese) - Guardian spirit of a warehouse
* Kurage-no-hinotama (Japanese) - Jellyfish which floats through the air as a fireball
* Kurupi (Guaraní) - Wild man and fertility spirit
* Kushtaka (Tlingit) - Shapeshifting otter spirit
* Kye-ryong (Korean) - Chicken-lizard hybrid
* Kyōkotsu (Japanese) - Ghost of a corpse discarded in a well
* Kyourinrin (Japanese) - Animated scroll or paper
* Kyūbi-no-kitsune (Japanese) - Nine-tailed fox
* Kyūketsuki (Japanese) - Vampire
A statue of Rangda, the queen of the Leyak.
A statue of Rangda, the queen of the Leyak.

* La-bar-tu (Assyrian) - Disease demon
* Labbu (Akkadian) - Sea snake
* La chusa (Spanish) - Death spirit
* Lady midday (Slavic) - Sunstroke spirit
* Lakanica (Slavic) - Field spirit
* Lake monster (Worldwide) - Gigantic animals reputed to inhabit various lakes around the world
* La Llorona (Latin America) - Death spirit associated with drowning
* Lambton Worm (English) - Giant worm (possibly a dragon)
* Lamia (Greek) - Child-devouring monster
* Lamiak (Basque) - Water spirit with bird feet
* Lammasu (Akkadian and Sumerian) - Protective spirit with the form of a winged bull or lion with a human head
* La Mojana (Colombian) - Shapeshifting, female water spirit
* Lampades (Greek) - Underworld nymph
* Landvættir (Norse) - Nature spirits
* Lares (Roman) - House spirit
* La Sayona (Venezuela) - Female ghost that punishes unfaithful husbands
* La Tunda (Colombian) - Nature spirit that seduces and kills men
* Laukų dvasios (Lithuanian) - Field spirit
* Lauma (Baltic) - Sky spirit
* Lavellan (Scottish) - Gigantic water rat
* Leanashe (Irish) - Possessing spirit or vampire
* Leimakids (Greek) - Meadow nymph
* Lenanshee (Celtic) - Fairy lover
* Leokampoi (Etruscan) - Fish-tailed lion
* Leontophone (Medieval Bestiary) - Tiny animal poisonous to lions
* Leprechaun (Irish) - Cobbler spirit
* Leszi (Slavic) - Tree spirit
* Leuce (Greek) - White poplar tree nymph
* Leucrota (Medieval Bestiary) - Hybrid of a lion and crocotta
* Leviathan (Jewish) - Sea monster
* Leyak (Balinese) - Anthropophagous flying head with entrails
* Lidérc (Hungary) - Magical chicken that transforms into a humanoid
* Lightning Bird (Southern Africa) - Magical bird that can be found at sites of lightning strikes
* Likho (Slavic) - One-eyed hag or goblin
* Lilin (Jewish) - Night-demoness
* Lilitu (Assyrian) - Winged demon
* Limnades (Greek) - Lake nymph
* Lindworm (Germanic) - Dragon
* Lizardman (Global) - Human-lizard hybrid
* Ljósálfar (Norse) - Sunlight spirit
* Llamhigyn Y Dwr (Welsh) - Frog-bat-lizard hybrid
* Lo-lol (Abenaki) - Hideous monster
* Lóng - Chinese dragon
* Long Ma (Chinese) - Dragon-horse hybrid
* Loogaroo (French America) - Shapeshifting, female vampire
* Lou Carcolh (French) - Snake-mollusk hybrid
* Lubber fiend (English) - House spirit
* Luduan (Chinese) - Truth-detecting animal
* Luison (Guaraní) - Death spirit
* Lutin (French) - Amusing goblin
* Lynx (Medieval Bestiaries) - Feline guide spirit
* Maa-alused (Estonian) - Subterranean spirit
* Maal (Bangladesh) - Malevolent water spirit
* Madremonte (Colombian) - Nature guardian
* Maero (Māori) - Savage, arboreal humanoids
* Magog (English) - Giant protector of London
* Maha-pudma (Hindu) - Giant elephant that holds up the world
* Maikubi (Japanese) - Quarreling heads of three dead miscreants
* Mairu (Basque) - Megalith-building giant
* Mājas gari (Latvian) - Benevolent house spirit
* Majin (Japanese) - Magical beings
* Makara (Indian) - Aquatic beings
* Makura-gaeshi (Japanese) - Pillow-moving spirit
* Mami Wata (Africa and the African diaspora) - Supernaturally beautiful water spirits
* Manananggal (Philippine) - Vampires that sever their torsos from their legs to fly around
* Mandrake (Medieval folklore) - Diminutive, animated construct
* Manes (Roman) - Ancestral spirits
* Mannegishi (Cree) -Little people with six fingers and no noses
* Manticore (Persian) - Lion-human-scorpion hybrid
* Mapinguari (Brazilian) - Giant sloth
* Mara (Scandinavian) - Female night-demon
* Mareikura (Tuamotu) - Attendant of Kiho-tumu, the supreme god
* Mares of Diomedes (Greek) - Man-eating horses
* Marid (Arabian) - Water genie
* Maro deivės (Lithuanian) - Disease spirits
* Maski-mon-gwe-zo-os (Abenaki) - Shapeshifting toad spirit
* Matagot (French) - Spirit that takes animal form, usually a black cat
* Mayura (Hindu) - Peacock spirit
* Mazikeen (Jewish) - Invisible, malevolent spirit
* Mbói Tu'ĩ (Guaraní) - Snake-parrot hybrid
* Mbwiri (Central Africa) - Possessing demon
* Mekurabe (Japanese) - Multiplying skulls that menaced Taira no Kiyomori in his courtyard
* Meliae (Greek) - Ash tree nymph
* Melusine (Medieval folklore) - Female water spirit, with the form of a winged mermaid
* Menehune (Hawaiian) - Little people and craftsmen
* Menninkäinen (Finnish) - Little people and nature spirits
* Merfolk (Worldwide) - Human-fish hybrid
* Merlion (Singapore) - Combination of a lion and a fish, the symbol of Singapore.
* Merrow (Irish and Scottish) - Human-fish hybrid
* Metee-kolen-ol (Abenaki) - Ice-hearted wizards
* Miage-nyūdō (Japanese) - Spirit which grows as fast as you can look up at it
* Mikoshi-nyūdō(Japanese) (Japanese) - Spirit which grows as fast as you can look up at it
* Mimi (Australian Aboriginal) - Extremely elongated humanoid that has to live in rock crevasses to avoid blowing away
* Minka Bird (Australian Aboriginal) - Death spirit
* Minotaur (Greek) - Human-bull hybrid
* Mishibizhiw (Ojibwa) - Feline water spirit
* Misi-ginebig (Ojibwa) - Serpentine rain spirit
* Misi-kinepikw (Cree) - Serpentine rain spirit
* Mizuchi (Japanese) - Water dragon
* Mohan (Latin America) - Nature spirit
* Mokoi (Australian Aboriginal) - Malevolent spirit that kills sorcerers
* Mokumokuren (Japanese) - Spirits that live in torn shōji
* Momonjii (Japanese) - Old man that meets victims at the fork of every road
* Moñái (Guaraní) - Giant snake with antennae
* Monocerus (Medieval Bestiary) - One-horned stag-horse-elephant-boar hybrid, sometimes treated as distinct from the unicorn
* Mono Grande (South America) - Giant monkey
* Monopod (Medieval Bestiaries) - Dwarf with one, giant foot
* Mora (Slavic) - Disembodied spirit
* Morgens (Breton and Welsh) - Water spirits
* Morinji-no-okama (Japanese) - Animated tea kettle
* Mormolykeia (Greek) - Underworld spirit
* Moroi (Romanian) - Vampiric ghost
* Mōryō (Japanese) - Long-eared, corpse-eating spirit
* Moss people (Germanic) - Little people and tree spirits
* Mountain Giant (Norse) - Giant
* Mujina (Japanese) - Shapeshifting badger spirit
* Mula Retinta (Colombian) - Malevolent storm spirit that takes the form of a mule
* Muldjewangk (Australian Aboriginal) - Water monster
* Muma Pădurii (Romanian) - Forest-dwelling hag
* Muscaliet (Medieval Bestiary) - Extremely hot hare-squirrel-boar hybrid
* Muse (Greek) - Spirits that inspire artists
* Myling (Scandinavian) - Ghosts of unbaptized children
* Myōbu (Japanese) - Fox spirit
* Myrmecoleon (Medieval Bestiaries) - Ant-lion hybrid
A Hoysala sculpture of a Naga couple. Halebidu.
A Hoysala sculpture of a Naga couple. Halebidu.

* Nachzehrer (German) - Anthropophagous undead
* Nāga (Buddhist and Hindu) - Nature and water spirits, serpentine or human-serpent hybrids
* Naga fireballs (Thai) - Spectral fire
* Nagual (Mesoamerica) - Human-animal shapeshifter
* Naiad (Greek) - Freshwater nymph
* Näkki (Finnish) - Water spirit
* Namahage (Japanese) - Ritual disciplinary demon from the Oga Peninsula
* Namazu (Japanese) - Giant catfish whose thrashing causing earthquakes
* Nando-baba (Japanese) - Old woman who hides under the floor in abandoned storerooms
* Nanom-keea-po-da (Abenaki) - Earthquake spirit
* Napaeae (Greek) - Grotto nymph
* Narecnitsi (Slavic) - Fate spirit
* Naree Pons (Thai) - Pod people
* Nargun (Gunai) - Water monster
* Narikama (Japanese) - Kettle spirit
* Nasnas (Arabian) - Half-human, half-demon creature with half a body
* Nav' (Slavic) - Ghost
* Nawao (Hawaiian) - Savage humanoid
* N-dam-keno-wet (Abenaki) - Fish-human hybrid
* Nebutori (Japanese) - Mystical disease which causes women to grow fat and lethargic
* Negret (Catalan) - Little people that turn into coins
* Nekomata (Japanese) - Split-tailed magical cat
* Nekomusume (Japanese) - Cat in the form of a girl
* Nemean Lion (Greek) - Lion with impenetrable skin
* Nephilim (Jewish) - Giant
* Nereid (Greek) - Nymph daughters of Nereus
* Ngen (Mapuche) - Nature spirit
* Nguruvilu (Mapuche) - Fox-like water snake
* Nian (Chinese) - Predatory animal
* Nightmarchers (Hawaiian) - Warrior ghosts
* Nikusui (Japanese) - Monster which appears as a young woman and sucks all of the flesh off of its victim's body
* Nimerigar (Shoshone) - Aggressive little people
* Ningyo (Japanese) - Monkey-fish hybrid
* Ninki Nanka (Western Africa) - Large reptile, possibly a dragon
* Nisse (Scandinavian) - House spirit
* Níðhöggr (Norse) - Dragon
* Nivatakavachas (Hindu) - Ocean demon
* Nix (Germanic) - Female water spirit
* Nobusuma (Japanese) - Supernatural wall. Also a monstrous flying squirrel
* Nocnitsa (Slavic) - Nightmare spirit
* Noppera-bō (Japanese) - Faceless ghost
* Nozuchi (Japanese) - Small sea serpent
* Nuckelavee (Scottish) - Malevolent human-horse-fish hybrid
* Nue (Japanese) - Monkey-raccoon dog-tiger-snake hybrid
* Nukekubi (Japanese) - Disembodied, flying head that attacks people
* Nuku-mai-tore (Māori) - Forest spirit
* Numen (Roman) - Tutelary spirit
* Nuno (Philippine) - Malevolent little people
* Nuppefuhofu (Japanese) - Animated lump of decaying human flesh
* Nuppeppo (Japanese) - Animated chuck of dead flesh
* Nurarihyon (Japanese) - Creature who sneaks into houses on busy evenings
* Nure-onna (Japanese) - Female monster who appears on the beach
* Nuribotoke (Japanese) - Animated corpse with blackened flesh and dangling eyeballs
* Nurikabe (Japanese) - Spirit that manifests as an endless wall
* Nykštukas (Lithuanian) - Cavern spirit
* Nymph (Greek) - Nature spirit
* Nyūbachibō (Japanese) - Mortar spirit
# Obake (Japanese) - Shapeshifting spirits
# Obariyon (Japanese) - Spook which rides piggyback on a human victim and becomes unbearably heavy
# Obayifo (Ashanti) - Vampiric possession spirit
# Obia (West Africa) - Gigantic animal that serves witches
# Oboro-guruma (Japanese) - Ghostly oxcart with the face of its driver
# Oceanid (Greek) - Nymph daughters of Oceanus
# Odei (Basque) - Storm spirit
# Odmience (Slavic) - Changeling
# Og (Jewish) - Giant king of the Amorites
# Ogre (Medieval folklore) - Large, grotesque humanoid
# Ohaguro-bettari (Japanese) - Female ghost lacking all facial features save for a large, black-toothed smile
# Oiwa (Japanese) - Ghost of a woman with a distorted face who was murdered by her husband
# Ōkamuro (Japanese) - Giant face which appears at the door
# Okiku (Japanese) - Plate-counting ghost of a servant girl
# Ōkubi (Japanese) - Death spirit
# Okuri-inu (Japanese) - Dog or wolf that follows travelers at night. Similar to the Black dog of English folklore
# Ōmukade (Japanese) - Giant, human-eating centipede that lives in the mountains
# Oni (Japanese) - Large, grotesque humanoid
# Onibi (Japanese) - Spectral fire
# Onikuma (Japanese) - Monstrous bear
# Onmoraki (Japanese) - Bird-demon created from the spirits of freshly-dead corpses
# Onocentaur (Medieval Bestiaries) - Human-donkey hybrid
# Onoskelis (Greek) - Shapeshifting demon
# Onryō (Japanese) - Vengeful ghost that manifests in physical (rather than spectral) form
# Onza (Aztec and Latin American folklore) - Wild cat, possibly a subspecies of cougar
# Oozlum bird (Unknown origin) - Bird that flies backwards
# Ophiotaurus (Greek) - Bull-serpent hybrid
# Opinicus (Heraldic) - Lion-eagle hybrid, similar to a griffin, but with leonine forelimbs
# Orang Bunian (Malay) - Forest spirit
# Orang Minyak (Malay) - Spectral rapist
# Ördög (Hungarian) - Shapeshifting demon
# Oread (Greek) - Mountain nymph
# Ork (Tyrolean) - Little people and house spirits
# Orobas (European) - Horse-headed, honest oracle classed as a demon
# Orphan Bird (Medieval Bestiaries) - Peacock-eagle-swan-crane hybrid
# Orthrus (Greek) - Two-headed dog
# Otoroshi (Japanese) - Hairy creature that perches on the gates to shrines and temples
# Otso (Finnish) - Bear spirit
# Ouroboros (Worldwide) - Mystic serpent/dragon that eats its own tail
# Ovinnik (Slavic) - Malevolent threshing house spirit
__________________