Hydarnes (c. 6th century BC) was one of the seven Persian conspirators who overthrew the Pseudo-Smerdis.

Hydarnes (also spelled Idernes), a Greek transliteration of the Old Persian name Vidṛna, may also refer to:

• Hydarnes the Younger (c. 5th century BC), son of Hydarnes, and a commander under Xerxes I
• Hydarnes (father of Stateira), nobleman active during the reign of Darius II (r. 423 – 404 BC), and descendant (perhaps grandson) of Hydarnes the Younger

This disambiguation page lists articles associated with the title Hydarnes.
If an internal link led you here, you may wish to change the link to point directly to the intended article.