Eupator (Greek: Τιβέριος Ἰούλιος Εὐπάτωρ Φιλοκαῖσαρ Φιλορωμαῖος Eὐσεβής, Tiberios Iulios Eupator Philocaesar Philoromaios Eusebes, flourished 2nd century, died c. 170) was a Roman client king of the Bosporan Kingdom.
Like many of the late Bosporan kings, Eupator is known mainly from coinage.
[1] His relations to other kings of the Bosporus are unknown; he might have been a son of Cotys II and a brother of his predecessor Rhoemetalces.
[2] He was succeeded by Sauromates II, perhaps his nephew,[2] whose coins are first known from the year 172.
Lucian had witnessed envoys sent by Eupator to travel to Bithynia to pay the Bosporan Kingdom's yearly tribute to Rome.