Arcathias (Ancient Greek: Ἀρκαθίας) was a Pontic prince of Persian and Greek Macedonian ancestry, and figure in the First Mithridatic War. Arcathias was a son of Mithridates VI of Pontus and his sister-wife Laodice.
Arcathias took an active part in the great battle fought near the river Amneius or Amnias in Paphlagonia (the modern Gök River), in which Nicomedes IV of Bithynia was defeated. Two years afterwards, in 87 BC, he invaded Macedonia with a separate army alongside a general named Taxilas. There they either annihilated the legions of Sentius or successfully ejected them from Macedonia. By 86 BC, he had completely conquered Macedonia. He then proceeded to march against Sulla, but died on the way, at Tidaeum (or Potidaea or Mount Tisaion).
- Mayor, Adrienne (2009). The Poison King: The Life and Legend of Mithradates, Rome's Deadliest Enemy. Princeton University Press. ISBN 9780691150260. Retrieved 2017-05-07.
- Strabo, Geographica xii. p.562
- Sherwin-White, Adrian Nicholas (1984). Roman foreign policy in the East, 168 B.C. to A.D. 1. Duckworth. p. 134. ISBN 9780715616826. Retrieved 2017-03-18.
- Appian, App. Mith. 17, 18, 35, 41
- Magie, David (1950). Roman Rule in Asia Minor, to the End of the Third Century After Christ. 11. Princeton University Press. p. 1105. Retrieved 2017-03-18.
This article incorporates text from a publication now in the public domain: Schmitz, Leonhard (1870). "Arcathias". In Smith, William (ed.). Dictionary of Greek and Roman Biography and Mythology. 1. p. 257.