| Sadyattes | |
|---|---|
| King of Lydia | |
| Reign | 637-c. 635 BC |
| Predecessor | Ardys |
| Successor | Alyattes |
| Died | c. 635 BC (?) |
| Spouse | Lyde |
| Issue | Alyattes |
| Dynasty | Mermnad dynasty |
| Father | Ardys |
Sadyattes (Ancient Greek: Σαδυάττης, romanized: Saduattēs; Latin: Sadyattēs; reigned 637–c. 635 BC) was the third king of the Mermnad dynasty in Lydia, the son of Ardys and the grandson of Gyges of Lydia. Sadyattes reigned 12 years according to Herodotus.