Zipoetes I, also Zipoites I or Ziboetes I, possibly Tiboetes I (in Greek Zιπoίτης or Zιβoίτης; lived c. 354 BC – 278 BC, ruled c. 326 BC – 278 BC; three syllables, oe is a diphthong) was the second independent ruler of Bithynia.
He succeeded his father Bas on the throne in 326 BC and reigned for forty-eight years carrying on successful wars with Lysimachus and Antiochus, the son of Seleucus I Nicator. In 315 BC he carried on a war against Astacus and Chalcedon, which failed for the relief sent by Antigonus I Monophthalmus' troops.; in 301, after Antigonus' death, he attacked again, and was victorious, but Astactus was destroyed in the war. He founded a city, which was called Zipoetium after him, at the foot of Mount Lypedron; the exact location of both the city and the mountain is unknown.
He lived to the age of seventy-six, and left behind him four children, the eldest of whom, Nicomedes, succeeded him. He was the first ruler of Bithyinia to assume the title of basileus (king), action he seems to have done in 297 BC.
| Preceded by Bas |
Dynast and King of Bithynia 326 BC – 278 BC |
Succeeded by Nicomedes I Zipoetes II |