Leyak may refer to:
- The enemy in Final Fantasy XIII.
- The unique monster in Final Fantasy XIII-2.
- The enemy from Final Fantasy XIV.
Leyak are cannibalistic humans who practice black magic in Balinese mythology. Led by their mistress, Rangda, they assume the form of regular people during the day, but at night, they detach their heads from their bodies and drag along their entrails as they search for women who have recently given birth so they can suck blood from newborn children.