Keith Baker's Eberron was the winning entry in Wizard of the Coast's 2002 setting search. The 2004 core setting book for Dungeons & Dragons 3.5 spawned an entire product line, including sourcebooks, a computer game, and novels. The setting was explicitly designed to incorporate all elements of the game, and is reduced in power with a scarcity of high level NPCs and spells.

Set after a destructive war on the continent of Khorvaire, the world is reminiscent of post-World War I Earth and includes themes from pulp, noir, and steampunk fiction. Magic is commonplace, with noble houses able to use the power of their Dragonmarks. The magewright and artificer classes harness magic to perform the work of technology, which is evident in the skyships and "lightning rail". Legacies of the Last War include "living spell" monsters of the magically apocalyptic Mournland and the former soldiers turned PC race known as the warforged.

The world is cosmopolitan, with new races including the dream-bonded kalashtar, the lycanthropic shifters, and the doppleganger kin known as changelings. There is not direct proof of the gods, and divine power is based on faith, with doctrinal differences, subversion, and even open antagonism possible between members of the same religion.