There are currently 169 known creature types.

aboleth (1)angel (12)animated statue (6)ankheg (2)arachnid (35)argos (1)
ariel (15)aurumvorax (2)balor (2)balrog (8)banshee (8)basilisk (3)
bat (29)bear (9)behir (1)beholder (5)bird (124)brownie (8)
buffalo (8)bulette (1)bullywug (1)catoblepas (2)centaur (26)centipede (8)
chimera (5)cockatrice (3)couatl (3)crocodile (4)crustacean (8)dark naga (3)
deepspawn (5)deer (30)demon (69)devil (8)dinosaur (15)displacer beast (3)
djinn (7)doll (7)dolphin (5)domestic cat (27)domestic dog (18)doppelganger (1)
dracon (122)dragon (42)dragonne (4)drow (103)dryad (6)dwarf (98)
efreet (3)elemental (45)elephant (1)elf (160)ettercap (1)ettin (2)
faerie (43)fey (164)fish (47)frog (23)galeb duhr (4)gargoyle (9)
gelatinous cube (4)ghost (74)giant (71)githyanki (4)glabrezu (3)gloomwing (1)
gnome (86)goblin (20)golem (42)gorgon (7)griffon (5)half-elf (68)
halfling (49)hare (17)harpy (7)hell hound (12)hezrou (1)high-elf (19)
hill-dwarf (7)hobbit (16)hobgoblin (3)horse (55)human (1258)hydra (6)
imp (15)incubus (2)insect (65)ithrix (10)kender (3)kobold (14)
lemure (2)lizard (17)lurker (1)lynx (2)manscorpion (2)manticore (1)
mermaid (5)merman (15)mimic (2)mindflayer (5)minotaur (133)mist (29)
mold (10)monkey (3)mudman (3)mummy (2)neogi (1)nightmare (6)
nymph (2)octopus (22)ogre (92)orc (47)pack animal (24)parasite (5)
peryton (1)pig (11)pixie (8)plant (35)rakshasa (1)reptile (11)
rhinocerous (1)robot (6)rodent (76)sahuagin (3)salamander (3)satyr (8)
scorpion (6)sea hag (4)sea serpent (5)shadow (14)shadow-elf (2)shark (6)
shedu (1)shrieker (3)sidhe (114)skeleton (35)skulk (1)slime (20)
snake (48)sprite (5)strangle weed (8)succubus (4)sylph (1)three-headed dog (2)
tinkergnome (5)titan (10)treant (5)troglodyte (2)troll (30)umber hulk (1)
undead (72)unicorn (6)unique (124)vampire (9)water weird (8)werewolf (7)
whale (4)wild cat (19)wild dog (29)wild-elf (4)winged snake (4)wolverine (2)
worm (16)wraith (24)wyvern (3)xorn (2)yeti (10)yuan-ti (5)
zombie (24)