Aristobulus IV (31–7 BC) was a prince of Judea from the Herodian dynasty, and was married to his cousin, Berenice, daughter of Costobarus and Salome I.

Aristobulus lived most of his life outside of Judaea, having been sent at age 12 along with his brother Alexander to be educated at the Imperial court of Rome in 20 BC, in the household of Augustus himself.

Aristobulus was only 3 years old when his paternal aunt Salome contrived to have his mother executed for adultery.

When the attractive young brothers returned to Jerusalem in 12 BC, the populace received them enthusiastically.

They also attracted the jealousy of their older half-brother, Antipater II, who deftly incited the aging king's anger with rumors of his favored sons' disloyalty.