Fachin, fachan or fachen is a monster or giant described by John Francis Campbell in Popular Tales of the West Highlands as having a single eye, a single hand, and a single leg.
Fachin may also refer to: Fâchin, a commune in Nièvre, Bourgogne-Franche-Comté, France Fachin (surname) Fa chin, the Wade-Giles romanization of fa jin (a Chinese martial arts concept)
See also Fachine (Chiliotrichum diffusum), a species of small shrub in the family, Asteraceae