This page lists Kings of Bithynia, an ancient kingdom in northwestern Anatolia.

Kings of Bithynia, 328-75 BC

• Zipoetes I 328-279 BC
• Nicomedes I 279-255 BC
• Zipoetes II 279-276 BC
• Zipoetes III 255 BC
• Ziaeias 255-228 BC
• Prusias I 228-185 BC
• Prusias II 185-149 BC
• Nicomedes II 149-128 BC
• Nicomedes III 128-94 BC
• Nicomedes IV 94-75 BC