List of legendary creatures (F)
- Fachen (Irish and Scottish) - Monster with half a body
- Fafnir (Germanic mythology) - Dwarf who was cursed and turned into a dragon. He was later slain by Sigurd in the Saga of Nibelung.
- Fairy (Many cultures worldwide--[esp. Germanic mythology/folklore]) - Nature spirits
- Familiar (English) - Animal servant
- Far darrig (Irish) - Little people that constantly play pranks
- Farfadet (French) - Small (some half-meter tall), wrinkled, and brown-skinned helpful sprites.
- The Fates (Greek) - Three time-controlling sisters
- Faun (Roman) - Human-goat hybrid nature spirit
- Fear gorta (Irish) - Hunger ghost
- Feathered Serpent - Mesoamerican dragon
- Fei Lian (Chinese) - Chinese wind god
- Fenghuang (Chinese) - Chinese Phoenix, female in marriage symbol
- Fenodyree (Manx) - House spirit
- Fenrir (Norse) - Gigantic, ravenous wolf
- Fetch (Irish) - Double or doppelgänger
- 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
- Flatwoods Monster (American Folklore) (West Virginia) - Alien, humanoid
- Fomorian (Irish) - Goat-headed giant
- Forest Bull (Medieval Bestiaries) - Giant horned red cattle
- Freybug - Norfolk black dog
- 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