Dxun is the moon of Onderon, a fictional planet in the Star Wars universe that appears in the video game Knights of the Old Republic II: The Sith Lords, among other sources.

It is told throughout the Star Wars universe that the Mandalorian Wars began on the moon of Dxun, where the former leader of the Mandalorians, Mandalore the Indomitable, had been killed at the end of the Great Sith War. During the time of Knights of the Old Republic II: The Sith Lords a new leader taking the name of Mandalore gathered the remaining Mandalorians, most of which were mercenaries at the time, on the moon of Dxun. There they regrouped, later helping a Jedi Exile destroy the battle cruiser known as the Ravager, which had been resurected from the long since destroyed world of Malachor V, by the Sith Lord Darth Nihilus.

Millennia later, the Sith Lord Darth Bane, fleeing the Battle of Ruusan, crash-landed on Dxun. It was here where formally decided on his plans for a reborn Sith Order. Dxun houses the tomb of Dark Lord of the Sith Freedon Nadd, who had conquered and ruled Onderon before his death, and many other Onderonian leaders.