| Nicomedes I | |
|---|---|
 Coin of Nikomedes I of Bithynia. Obverse shows head of Nikomedes diademed. Reverse shows Bendis seated; legend ΒΑΣΙΛΕΩΣ ΝΙΚΟΜΗΔΟΥ[Σ]. | |
| Basileus of Bithynia | |
| Reign | c. 278-255 BC |
| Predecessor | Zipoetes I |
| Successor | Etazeta of Bithynia |
| Born | c. 300 BC |
| Died | c. 255 BC |
| Consort | Ditizele Etazeta |
| Issue | Ziaelas Prusias Lysandra |
| Father | Zipoetes I |
Nicomedes I (Ancient Greek: Νικομήδης; lived c. 300 BC – c. 255 BC, reigned 278 BC – c. 255 BC), second king of Bithynia, was the eldest son of Zipoetes I, whom he succeeded on the throne in 278 BC.[1]