Mistborn is a series of epic fantasy novels written by American author Brandon Sanderson and published by Tor Books. The first trilogy, published between 2006 and 2008, consists of The Final Empire, The Well of Ascension, and The Hero of Ages. A second series was released between 2011 and 2022, and consists of the quartet The Alloy of Law, Shadows of Self, The Bands of Mourning and The Lost Metal. Sanderson also released a novella in 2016, Mistborn: Secret History. Sanderson plans to write a third and fourth series.

The first Mistborn trilogy chronicles the efforts of a secret group of Allomancers who attempt to overthrow a dystopian empire and establish themselves in a world covered by ash. The first trilogy was a huge success. This success pushed Sanderson to further develop his fictional universe, the Cosmere, which also includes The Stormlight Archive. Set about 300 years after the ending of the first trilogy, the second series is about the exploits of a character forced to move into the big city, and starts investigating kidnappings and robberies. The third series will be set in the early computer age with 1980s technology. The fourth series is planned to be a space-opera.