List of legendary creatures (B)
- Ba – Soul of the deceased, depicted as a bird or a human-headed bird
- Baba Yaga – Forest spirit and hag
- Babi ngepet – Monster boar
- Baccoo – Malevolent little people
- Badalisc – Goat-like creature from the southern central Alps
- Bagiennik – Malevolent water spirit
- Bahamut – Very powerful dragon-like demon
- Bai Ze – Talking beast which handed down knowledge on harmful spirits
- Ba Jiao Gui – Banana tree spirit
- Bak – Assamese shape-shifting aqueous creature
- Bake-kujira – Ghostly whale skeleton that drifts along the coastline of Shimane Prefecture
- Bakeneko – Magical cat
- Bakezōri – Animated straw sandal
- Bakhtak – Night demon named Shaina
- Baku – Dream-devouring, tapir-like creature
- Bakunawa – Sea serpent that causes eclipses
- Balaur – Multi-headed dragon
- Baloz – Sea monster
- Bannik – Bathhouse spirit
- Banshee – Screaming death spirit
- Baobhan Sith – Beautiful vampiric seductresses who prey on young travelers
- Bardha – Mountain spirit
- Bardi – Shapechanging death spirit
- Barghest – Yorkshire black dog
- Bar Juchne – Gigantic bird
- Barnacle Geese – Geese which hatch from barnacles
- Barometz – Plant-lamb hybrid
- Barong – Tutelary spirit
- Basajaun – Ancestral, megalith-building race
- Baš Čelik – Powerful, evil winged man whose soul is not held by his body and can be subdued only by causing him to suffer dehydration
- Bashe – Elephant-swallowing serpent
- Basilisco Chilote – Chicken-serpent hybrid
- Basilisk – Multi-limbed, venomous lizard
- Basty - Evil spirit or goblin of bad dreams
- Bathala – Primordial god of creation
- Batibat – Female night-demon
- Batsu – Drought spirit
- Baubas – Malevolent spirit
- Bauk – Darkness beast
- Baykok – Flying skeleton
- Beast of Bray Road – Werewolf
- Beast of Gévaudan – French werewolf
- Beast of the Earth
- Bean Nighe
- Behemoth – Massive beast, possibly like a dinosaur or elephant
- Bendigeidfran – Giant king
- Bennu – Heron-like, regenerative bird, equivalent to the Phoenix
- Berehynia – Water spirit
- Bergrisar – Mountain giants who live alongside the Hrimthursar in Jotunheim
- Bergsrå – Mountain spirit
- Bestial beast – Centauroid specter
- Betobeto-san – Invisible spirit which follows people at night, making the sound of footsteps
- Bhūta – Ghost of someone killed by execution or suicide
- Bi-blouk – Female, cannibalistic, partially invisible monster
- Bicorn – Human-faced cow that feeds on good men
- Bichura – House spirit that can take the form of cats or dogs
- Bies – Demon
- Bigfoot – Forest-dwelling hominid cryptid.
- Binbōgami – Spirit of poverty
- Biscione - Large grass snake
- Bishop-fish – Fish-like humanoid
- Biwa-bokuboku – Animated biwa
- Bixi – Dragon with the shell of a turtle
- Black Annis – Blue-faced hag
- Black Dog – Canine death spirit
- Black Lady of Bradley Woods – Female ghost which reportedly haunts the woods near the village of Bradley, Lincolnshire, England
- Black Shuck – Norfolk, Essex, and Suffolk black dog
- Blafard – Imaginary creature from the early United States of America
- Blemmyae – Headless humanoid with face in torso
- Bloody Bones – Water bogeyman
- Błudnik – Mischievous gnome
- Blue Crow – Giant amazonian bird
- Bluecap – Mine-dwelling fairy
- Bodach – Malevolent spirit
- Bogeyman – Malevolent spirit
- Boggart – Malevolent household spirit
- Boginki – Nature spirit
- Bogle – Malevolent spirit
- Boi-tatá – Giant snake
- Bolla – Dragon
- Bolotnik – Male swamp spirit
- Bonnacon – Bull-horse hybrid with flaming dung
- Boo Hag – Vampire-like creature that steals energy from sleeping victims
- Boobrie – Roaring water bird
- Boroboroton – Animated futon
- Bozaloshtsh – Death spirit
- Brag – Malevolent water horse
- British big cat – mysterious black panther
- Brownie – Benevolent household spirit
- Broxa – Nocturnal bird that drains goats of their milk
- Bucca – Male sea-spirit, a merman, that inhabited mines and coastal communities as a hobgoblin during storms
- Bokkenrijders – Ghosts/devils riding flying goats; co-opted by bandits to instil fear during raids
- Bugbear – Bearlike goblin
- Buggane – Ogre-like humanoid
- Bugul Noz – Extremely ugly, but kind, forest spirit
- Bukavac – Six-legged lake monster
- Bulgae – Fire dog
- Bunyip – Horse-walrus hybrid lake monster
- Bunny Man Virginia, Maryland, and Washington, D.C. Urban Legend – Spirit/Maniac that wears a bunny costume and wields an ax
- Bush Dai Dai – Spirit that seduces and kills men
- Byangoma – Fortune-telling birds
- Bysen – Diminutive forest spirit