From Infogalactic: the planetary knowledge core
- Paasselkä devils (Finnish) - Spectral fire
- Pamola (Abenaki) - Weather spirit
- Panes (Greek) - Human-goat hybrids descended from the god Pan
- Pandi (Medieval Bestiary) - Humanoid with giant ears, eight fingers and toes, and white hair
- Panis (Hindu) - Demons with herds of stolen cows
- Panlong (Chinese) - Water dragon
- Panotti (Medieval Bestiaries) - Humanoid with gigantic ears
- Panther (Medieval Bestiaries) - Feline with sweet breath
- Parandrus (Medieval Bestiaries) - Shapeshifting animal whose natural form was a large ruminant
- Pard (Medieval Bestiaries) - Fast, spotted feline believed to mate with lions to produce leopards
- Pardalokampoi (Etruscan) - Fish-tailed panther
- Patagon (Medieval folklore) - Giant race reputed to live in the area of Patagonia
- Patasola (Latin America) - Anthropophagous, one-legged humanoid
- Patupairehe (Māori) - White-skinned nature spirits
- Pech (Scottish) - Strong little people
- Pegaeae (Greek) - Spring nymph
- Pegasus (Greek) - Winged horse
- Pegacorn - Pegasus combined with a unicorn
- Pelesit (Malay) - Servant spirit
- Peluda (French) - Dragon
- Penanggalan (Philippine) - Vampires that sever their heads from their bodies to fly around, usually with their intestines or other internal organs trailing behind
- Peng (Chinese) - Giant bird
- Penghou (Chinese) - Tree spirit
- Peri (Persian) - Winged humanoid
- Peryton (Allegedly Medieval folklore) - Deer-bird hybrid
- Pesanta (Catalan) - Nightmare demon in the form of a cat or dog
- Peuchen (Chilota and Mapuche) - Vampiric, flying, shapeshifting serpent
- Phi Tai Hong, the ghost of a person who has died suddenly of a violent or cruel death in Thai folklore
- Phoenix (Phoenician) - Regenerative bird
- Piasa (Native American mythology) - Winged, antlered feline-like dragon
- Piatek (Armenian) - Large land animal
- Pictish Beast (Pictish stones) - Stylistic animal, possibly a dragon
- Pillan (Mapuche) - Nature spirit
- Pim-skwa-wagen-owad (Abenaki) - Water spirit
- Piru (Finnish) - Minor demon
- Pishacha (Hindu) - Carrion-eating demon
- Pita-skog (Abenaki) - Serpentine rain spirit
- Pixie (Cornish) - Little people and nature spirits
- Pixiu (Chinese) - Winged lion
- Pi yao (Chinese) - Horned, dragon-lion hybrid
- Plakavac (Slavic) - Vampire created when a mother strangles her child
- Pok-wejee-men (Abenaki) - Tree spirit
- Polevik (Polish) - Little people and field spirits
- Pollo Maligno (Colombian) - Man-eating chicken spirit
- Polong (Malay) - Invisible servant spirit
- Poltergeist (German) - Ghost that moves objects
- Pombero (Guaraní) - Wild man and nature spirit
- Ponaturi (Māori) - Grotesque, malevolent humanoid
- Pontianak (Malay) - Undead, vampiric women who died in childbirth
- Poukai (Māori) - Giant bird
- Preta (Buddhist, Hindu, and Jain) - Ghosts of especially greedy people
- Pricolici (Romanian - Roman) - Undead wolf
- Psoglav (Serbia) - Dog-headed monster
- Psotnik (Slavic) - Mischievous spirit
- Psychai (Greek) - Butterfly-winged nymphs, daughters of Psyche
- Pterippus (Greek) - Winged horse
- Púca (Welsh) - Shapeshifting animal spirit
- Púki (Icelandic) - Malevolent little person
- Puck (English) - House spirit
- Putz (German) - House spirit
- Pugot (Philippine) - Headless humanoid
- Puk (Frisian) - house spirit
- Pūķis (Latvian) - Malevolent house spirit
- Puckwudgie (Native American mythology) - Troll-like being with gray skin
- Pygmy (Greek) - Little people
- Pyrausta (Greek) - Insect-dragon hybrid
- Python (Greek) - Serpentine dragon