Madyes was a Scythian king who ruled during the period of the Scythian presence in West Asia in the 7th century BCE.

Madyes was the son of the Scythian king Bartatua and the Assyrian princess Šērūʾa-ēṭirat, and, as an ally of the Neo-Assyrian Empire, which was then the superpower of West Asia and whose king Ashurbanipal was his uncle, he brought Scythian power to its peak in West Asia.

After the Neo-Assyrian Empire started unraveling, Madyes was assassinated by the Median king Cyaxares, who expelled the Scythians from West Asia.