Cotys II or Kotys II (Greek: Τιβέριος Ἰούλιος Κότυς Β' Φιλοκαῖσαρ Φιλορωμαῖος Eὐσεβής, Tiberios Iulios Kotys Philocaesar Philoromaios Eusebes, flourished 2nd century, died 131) was a prince and Roman client king of the Bosporan Kingdom.

Like many other later Bosporan kings, Cotys II is known mainly from coinage, alongside a few inscriptions and contemporary writings.

[1] Cotys II is known to have been the son of his predecessor Sauromates I.

[2] His relationship to later kings is not known for certain, but it is possible that his two immediate successors Rhoemetalces and Eupator were his sons.

[2] During his reign, the city of Chersonesus Taurica was under his direct control.