Aba (flourished 1st century BC) was a female Tyrant ruler of the state of Olba in Ancient Anatolia.

[1] She was the daughter of the tyrant (absolute ruler) Zenophanes (or Xenophanes) of the Olba kingdom in Cilicia (present-day Turkey).

Her father trained her in politics and she was appointed to the post of priestess prior to her rule.

[2] She succeeded her father as tyrant-ruler of Olba where a temple was located of Jupiter, founded by Ajax, son of Teucer.

[2] She was ultimately deposed, but her descendants ruled over Olba until its definitive incorporation into the Roman Empire.