Peucolaus Soter Dicaeus (Ancient Greek: Πευκόλαος Σωτήρ Δίκαιος, romanized: Peukolaos Sōtēr Dikaios; epithets mean respectively, "the Saviour", "the Just") was an Indo-Greek king who ruled in the area of Gandhara c. 90 BCE.

His reign was probably short and insignificant, since he left only a few coins, but the relations of the latter Indo-Greek kings remain largely obscure.

However the name Peucolaus is a Greek name found mainly in ancient Macedonia and derived from the words πεύκη ("pine") and λαός ("people").

[3] Peucolaus struck rare Indian standard silver coins with portrait in diadem, and a reverse of a standing Zeus, which resemble the reverse of contemporary kings Heliokles II and Archebios.

He also issued bilingual bronzes with Artemis and a crowned woman with a palm branch, perhaps a city-goddess or a personification of Tyche, the deity for good luck.