Leucon II of Bosporus (Ancient Greek: Λέυκων, romanized: Leukon; c. 240 – 220 BC), also known as Leuco, seems to have been the second son of Paerisades II and a Spartocid ruler of the Bosporan Kingdom in 240 BC.

Leucon killed his brother, Spartocus IV, after discovering that he had been engaged in an adulterous affair with Leukon's wife, Alcathoe, and assumed the throne.

[2] Leucon also supposedly endured an economic crisis in the 3rd century BC, when he minted new coins with his own name, in order to maintain his kingdom.

Hygiaenon was not a member of the Spartocid dynasty and may have been a supporter of Camasarye, the daughter and heiress of Spartocus IV.

[3] Collection of coins from the reign of Leucon II here This biography of a member of a European royal house is a stub.