Aristobulus II (died 49 bc) was the last of the Hasmonean (Maccabean) kings of Judaea.
On the death (67 bc) of his mother, Salome Alexandra, he succeeded to the throne, defeating his brother and rival, John Hyrcanus II (q.v.). When Hyrcanus sought help from the Nabataeans, the Romans under Pompey intervened and subjected Judaea to their rule (63 bc). After an unsuccessful attempt to regain power in 56, Aristobulus was sent to Rome as a prisoner and remained there until his death.