List of legendary creatures (J)
- Jackalope – Rabbit with antlers
- Jack Frost - Personified of ice, winter and snow
- Jack-In-Irons – Malevolent giant
- Jack-o'-lantern – Vegetal lantern
- Jaculus – Winged serpent or small dragon
- Jake the Alligator Man
- Jaroszek
- Jasconius – Island-sized fish
- Jasy Jaterei – Nature guardian and bogeyman
- Jatayu – Vulture demigod
- Jaud – Vampirised premature baby
- Jenglot – Vampiric little people
- Jengu – Water spirit
- Jentil – Megalith-building giant
- Jenu – Anthropophagous giant
- Jerff – Gluttonous dog-cat-fox hybrid
- Jersey Devil – Demonic dragon or flying demon who was given birth to by an American living in New Jersey
- Jian – One-eyed, one-winged bird who requires a mate for survival
- Jiangshi – Life-draining, reanimated corpse
- Jiaolong – Dragon
- Jibakurei – Spirit that protects a specific place
- Jievaras – House spirit
- Jikininki – Corpse-eating ghost
- Jinn – Spiritual creatures; genii
- Jipijka'm – Underwater horned snake; lives in lakes and eats humans
- Jiufeng – Nine-headed bird worshiped by ancient natives in Hubei Province.
- Jiu tou niao – Nine-headed, demonic bird
- Jogah – Little people nature spirit
- Jörmungandr – Sea serpent
- Jorōgumo – Spider woman
- Jotai – Animated folding screen cloth
- Jötunn – Gigantic nature spirits
- Jujak – Bird
- Jumbee – Malevolent spirit