Cait Sith is an alternate name for Cat-sìth, a type of fairy in Scottish mythology.
Cait Sith may also refer to:
Cait Sith (Final Fantasy), a cat robot protagonist introduced in Final Fantasy VII Regal Feline Cait Sith, a character introduced in Final Fantasy XI Cait Sith (Boarding School Juliet), the head prefect of the "White Cats Dormitory" in Boarding School Juliet Cait Sith, a demon/Persona in the Megami Tensei franchise