| Ziaelas | |
|---|---|
| Basileus of Bithynia | |
| King of Bithynia | |
| Reign | c. 254 BC - 228 BC |
| Predecessor | Etazeta |
| Successor | Prusias I |
| Born | c. 265 BC |
| Died | 228 BC (age 37) |
| Issue | Prusias I |
| Father | Nicomedes I |
Ziaelas (‹See Tfd›Greek: Ζιαήλας; lived c. 265 BC – 228 BC, reigned c. 254 BC – 228 BC), third king of Bithynia, was a son of Nicomedes I and Ditizele.