A homunculus is a small artificial human or human-like being.

Homunculus, Homonculus or Homunculi may also refer to:

Arts and entertainment Homunculus (novel), 1986 comic science fiction novel by James Blaylock The Homunculus, 1949 novel by David H. Keller Homunculus (manga), 2003 manga by Hideo Yamamoto The Homunculi, a group of characters from the anime and manga Fullmetal Alchemist Homunculus (film), a German sci-fi serial shown theatrically in 1916

Music "Homonculus", a song from the album Knife Play by the American band Xiu Xiu “Homonculus”, a song from the album Cross Collateral by the German jazz group Passport

Science Homunculus (genus), an extinct genus of New World monkeys Homunculus Nebula, a nebula Cortical homunculus, a distorted representation of the human body Fetiform teratoma, a rare cyst having a fetal structure

Other uses Homunculus argument, a fallacy arising most commonly in the theory of vision