| Vistahm | |
|---|---|
 Coin of Vistahm, minted at Ray in 595/6. | |
| Rival King of Kings of Iran and non-Iran | |
| Reign | 590/1–596 or 594/5–600 |
| Predecessor | Khosrow II |
| Successor | Khosrow II |
| Died | 596 or 600 |
| Spouse | Gordiya |
| House | Ispahbudhan |
| Father | Shapur |
| Religion | Zoroastrianism |
Vistahm or Bistam (also transliterated Wistaxm, Middle Persian: 𐭥𐭮𐭲𐭧𐭬 wsthm[1]), was a Parthian dynasty of the Ispahbudhan house, and maternal uncle of the Sasanian king of kings of Iran, Khosrow II (r. 590–628). Vistahm helped Khosrow regain his throne after the rebellion of another Parthian noble Bahram Chobin, of House of Mihran, but later led a revolt himself, and ruled independently over a region which encompassed the entire Iranian East until he was defeated by Khosrow and his allies.
- ^ Gyselen, Rika (2001). "Lorsque l'archéologie rencontre la tradition littéraire. Les titres des chefs d'armée de l'Iran sassanide". Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres. 145 (1): 447–459. doi:10.3406/crai.2001.16274.