List of legendary creatures (L)
- La-bar-tu (Assyrian) - Disease demon
- Labbu (Akkadian) - Sea snake
- Lady midday (Slavic) - Sunstroke spirit
- Ladon (Greek) - Dragon guarding the golden apples of the Hesperides
- Laelaps (Greek) - Enchanted dog that always caught his prey
- Laestrygonians (Greek) - Anthropophagic giants
- Lakanica (Slavic) - Field spirit
- Lake monster (Worldwide) - Gigantic animals reported to inhabit various lakes around the world
- Lakhey (Nepalese) - Demon with fangs
- La Llorona (Latin America) - Death spirit associated with drowning
- Lamassu (Akkadian and Sumerian) - Protective spirit with the form of a winged bull or human-headed lion
- Lambton Worm (English) - Giant worm
- Lamia (Greek) - Child-devouring monster
- Lamiak (Basque) - Water spirit with bird feet
- La Mojana (Colombian) - Shapeshifting, female water spirit
- Lampades (Greek) - Underworld nymph
- Landvættir (Norse) - Nature spirits
- Langmeidong (Manipuri mythology) - Semi human, semi hornbill creature
- Lares (Roman) - House spirit
- La Sayona (Venezuela) - Female ghost that punishes unfaithful husbands
- La Tunda (Colombian) - Nature spirit that seduces and kills men
- Lava bear - Miniature bear thought to inhabit the lava beds of south central Oregon
- Laukų dvasios (Lithuanian) - Field spirit
- Lauma (Baltic) - Sky spirit
- Lavellan (Scottish) - Gigantic water rat
- Leanan sidhe (Celtic) - Fairy lover
- Leanashe (Irish) - Possessing spirit or vampire
- Leimakids (Greek) - Meadow nymph
- 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) - Crocotta-lion hybrid
- Leviathan (Jewish) - Sea monster seen in Job 41
- Leyak (Balinese) - Anthropophagous flying head with entrails
- Libyan Aegipanes (Medieval Bestiaries) - Human-horse hybrid
- Libyan Satyr (Medieval Bestiaries) - Human-goat hybrid
- Lidérc (Hungary) - Magical chicken that transforms into a humanoid
- Lightning Bird (Southern Africa) - Magical bird 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
- Ljósálfar (Norse) - Sunlight spirits; the Light Elves
- Ljubi (Albanian)- Demoness
- Llamhigyn Y Dwr (Welsh) - Frog-bat-lizard hybrid
- Loch Ness Monster (Scottish) - Serpentine sea monster
- Loki (Norse mythology) - God of night
- Lo-lol (Abenaki) - Hideous monster
- Lóng - Chinese dragon
- Longana (Italian) - Female human-goat hybrid and water spirit
- Long Ma (Chinese) - Dragon-horse hybrid
- Loogaroo (French America) - Shapeshifting, female vampire
- Lou Carcolh (French) - Snake-mollusk hybrid
- Loup-garou (French) - Werewolf
- Loveland frog (American Folklore) (Ohio) - Cryptid, Humanoid Frog
- Lubber fiend (English) - House spirit
- Luduan (Chinese) - Truth-detecting animal
- Lugat (Albanian) - Vampire
- Luison (Guaraní) - Werewolf | Cadaver-eating dog
- Lusca - Sea Monster
- Lutin (French) - Amusing goblin
- Lycanthrope (Greek) - Werewolf
- Lyngbakr
- Lynx (Medieval Bestiaries) - Feline guide spirit