 | This article relies largely or entirely on a single source. (February 2021) |
| Cyrus I | |
|---|---|
 Cyrus I on horseback from a seal | |
| King of Persia | |
| Reign | 600–580 BC |
| Predecessor | Teispes |
| Successor | Cambyses I |
| Died | 580 BC Anshan (Persia) |
| Burial | 580 BC |
| Spouse | Parsumaš |
| Issue | Cambyses I Arukku? |
| House | Achamenids |
| Father | Teispes |
| Religion | Zoroastrianism |
Cyrus I (Old Persian: Kuruš) or Cyrus I of Anshan or Cyrus I of Persia, was King of Anshan in Persia from c. 600 to 580 BC or, according to others, from c. 652 to 600 BC. Cyrus I of Anshan is the grandfather of Cyrus the Great, also known as Cyrus II. His name in Modern Persian is کوروش, Kūroš, while in Greek he was called Κῦρος, Kȳros.