- Waldgeist (German) – Forest spirit
- Wana-games-ak (Abenaki) – Water spirits
- Wangliang (Chinese) – Malevolent spirit or monster
- Wani (Japanese) – Crocodilian water monster
- Wanyūdō (Japanese) – Demon in the form of a burning human-headed ox cart
- Warak ngendog (Indonesian Muslim) – Egg-laying bird
- Warg (English and Scandinavian O.N. vargr) – Giant, demonic wolf
- Warlock (Worldwide) – Male witch
- Warraguk (Australian Aboriginal) – Flying humanoid
- Wassan-mon-ganeehla-ak (Abenaki) – Aurora spirits
- Water monkey (Chinese) – Water spirit
- Water sprite (Alchemy) – Water elemental
- Wati-kutjara (Australia Aboriginal) – Goanna spirits
- Wa-won-dee-a-megw (Abenaki) – Shapeshifting snail spirit
- Wechuge (Athabaskan) – Human-eating supernatural creature
- Weiße Frauen (German) – Female spirit
- Wekufe (Mapuche) – Demon
- Wendigo (Algonquian) – Cannibalistic evil spirit
- Wentshukumishiteu (Inuit) – Water spirit
- Werecat (Worldwide) – Feline-human shapeshifter
- Werehyena (African and Near Eastern) – Hyena-human shapeshifter
- Werewolf (Worldwide) – Wolf-human shapeshifter
- Wewe Gombel (Javanese) – Ghost who kidnaps children
- White Lady (Worldwide) – Ghost of a murdered or mistreated woman
- Whowie (Australian Aboriginal) – Giant frog-headed goanna with six legs
- Wild man (European) – Hairy, bipedal, man-like creature
- Will-o'-the-Wisp (Worldwide) – Spectral fire
- Winged genie (Assyrian) – Bearded male figures sporting birds
- Winged lion
- Wirry-cow (Scottish) – Malevolent spirit
- Witch (Worldwide) – Person who practices magic
- Witte Wieven (Dutch) – Female, ancestral spirit
- Wolpertinger (German) – Forest animal comprised from various animal parts (similar to a Chimera)
- Wondjina (Australia Aboriginal) – Weather spirit
- Wraith (Scottish) – Water spirit or ghostly apparition
- Wulver (Scottish) – Wolf-headed humanoid spirit
- Wu Tou Gui (Chinese) – Beheaded ghost
- Wyrm (European) – Dragon or serpent
- Wyvern (Germanic Heraldic) – Flying reptile, usually with two legs and two wings