Poecilasium or Poikilasion or Poecilassus or Poikilassos (Ποικίλασσος) was a town on the south coast of ancient Crete. Ancient sources disagree as to its location: Ptolemy places the town east of Tarrha, between it and the promontory called Hermaea; the Stadiasmus Maris Magni places it west of Tarrha, between it and Syia 60 stadia from the former and 50 stadia from the latter. Poecilasium was not an autonomous city-state (polis).