Gaius Julius Sohaemus[1] (Ancient Greek: Γάϊος Ἰούλιος Σόαιμος; died 180) was a Roman client king of Armenia.

[6] In honor of his first ascent to the throne of Armenia, a sestertius with images of Sohaemus and Antoninus Pius was issued in Rome with the inscription "A king given to the Armenians".

Sohaemus was a contemporary to the rule of the Roman emperors Antoninus Pius, Marcus Aurelius, Lucius Verus and Commodus of the Nerva–Antonine dynasty.

[8] These events provoked a new Roman-Parthian war and peace was made on Roman terms, with Sohaemus reinstalled as King of Armenia by Lucius Verus in either 163 or 164.

Emperor Marcus Aurelius tried to declare Armenia a province of Rome, but the uprising of Armenians led by Prince Tiridates forced the Romans to abandon their plans.

[12] A man called Tiridates, who had murdered the King of the Osroenes and had brandished his sword in the face of Publius Martius Verus, the governor of Cappadocia, when rebuked for it, stirred up trouble in Armenia.