Tahmuras or Tahmures (طهمورث), Arabic transliteration , older Persian Tahmurat, is the third Shāh of the world according to Ferdowsi's Shāhnāma.

Tahmuras in the Shāhnāma

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Tahmuras was the son of Hushang. In his time the world was much troubled by the demons of Ahriman. On the advice of his vizier Šaydāsp (شیداسپ), Tahmuras used magic to subdue Ahriman and made him his slave, even riding upon his back as on a horse. The demons rebelled against Tahmuras, and he made war against them with both magic and force. By magic he bound two-thirds of the demons; the remaining third he crushed with his mace. The race of divs now became Tahmuras's slaves, and they taught him the art of writing in thirty different scripts.

Like his father, Tahmuras was a great inventor of arts for easing the human condition. He invented the spinning and weaving of wool, learned to domesticate chickens, how to store up fodder for livestock instead of merely grazing them, and how to train animals like dogs and falcons to hunt for people.

Tahmures ruled for thirty years and was succeeded by his son Jamshid.