Sibyrtius

thumb|250px|Sibyrtius was satrap of Arachosia and Gedrosia after the death of Alexander. Sibyrtius ( Sivyrtios; lived 4th century BC) was a Greek officer from Crete in the service of Alexander the Great, who was the satrap of Arachosia and Gedrosia shortly after the death of Alexander until about 303 BC.

After serving in Alexander's army for a number of years, Sibyrtius was appointed by Alexander, on his return from India (326 BCE), governor of the province of Carmania. Shortly after, Sibyrtius exchanged this post for the more important satrapy of Arachosia and Gedrosia, to which he succeeded on the death of Thoas (Θόας).