Udun (disambiguation)
# Udun (disambiguation)

Udûn may mean:

## In Tolkien's Middle-earth writings

* Udûn, Iron Mountains, also called Utumno, the underground fortress of Morgoth in the Age of the Lamps, before the First Age of Middle-earth
* Udûn, Mordor, the plain by the Black Gate at the northwestern point of Mordor in the Third Age

## In motion pictures

* Udûn, an episode in the streaming series The Lord of the Rings: The Rings of Power
