Animals (generic nonfictional animals)
- Bats
- Bears
- Boars
- Deer
- Dogs
- Horses
- Lions
- Mud crabs
- Rats
- Sabertooth Tigers
- Sheep
- Slaughter Fish
- Wolves
Monsters (monsters and fictional animals)
- Alits
- Baliwogs
- Centaurs
- Cliff racers
- Dragonlings
- Dreughs
- Durzogs
- Elytra
- Gargoyles
- Giants
- Giant Spiders
- Giant Scorpions
- Gnarls
- Goblins
- Golems (varieties: ice, iron, and stone)
- Grahls
- Grummites
- Guars
- Harpies
- Homonculus
- Horkers
- Imps
- Lamia
- Lizard men
- Medusa
- Minotaurs
- Nymphs
- Ogres
- Rieklings
- Scalon
- Spriggans
- Tusked Bristlebacks
- Trolls
- Vampires
- Wereboars
- Werewolves
- Will-o-the-Wisps
Undead
- Bone lords
- Bone Walkers
- Bonewolves
- Draugr
- Ghosts
- Ghouls
- Liches
- Mummies
- Skinned Hounds
- Shambles
- Skeletons
- Spectres
- Wraiths
- Zombies
Deadra
- Atronach (varieties: air, flame, flesh, frost, iron, and storm)
- Clannfear
- Dark Seducers
- Deadra Seducers
- Deadroths
- Dremora
- Fire Deamons
- Golden Saints
- Hell Hounds
- Ogrims
- Scamps
- Spider Deadra
- Winged Twilights
- Xivilai
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Confirmed Creatures Returning in Skyrim
Animals
- Bats
- Dogs
- Sabre-toothed Cats (a.k.a. Sabertooth Tigers)
- Wolves
Monsters
- Giants
- Giant spiders
- Trolls
Undead
- Draugr
- Skeletons
- Zombies
Deadra
- Frost Atronach
Confirmed New Creatures in Skyrim
Animals
- Birds
- Elk
- Fish (other than slaughter fish)
- Mammoths
- Rabbits
Monsters
- Dragons
Undead
- Ice wraiths
Deadra
- ?