|This article is about the son of Artaxerxes I of Persia. For other uses, see Darius.|
Darius II Ochus (died 404 BCE) was king of the Achaemenid Empire from 423 BCE until his death in 404 BCE.
After Amorges' eventual defeat, he provided his old friend Artabanus–who now operated under the name of "Darius"–with Elpidios' whereabouts. On a small island south of Messenia, Darius handed over the baby to Kassandra before being greeted by Artabanus. After Darius introduced himself as Artaxerxes II's son, he was entrusted by the elderly Artabanus with keeping Persia safe.