Sirian

Sirian or Sirians may refer to:
 * Sirian, Iran, a village in Isfahan Province, Iran
 * George Sirian (1818–1891), American naval officer

Fictional aliens

 * Human adversaries in Lucky Starr and the Pirates of the Asteroids and other Lucky Starr novels by Isaac Asimov writing as Paul French
 * Citizens of the Sirian Empire in The Sirian Experiments by Doris Lessing
 * An alien race in The Age of the Pussyfoot by Frederik Pohl
 * An alien race in Wasp (novel) by Eric Frank Russell
 * An alien race in Serious Sam
 * Alien invaders in XF5700 Mantis