The League of Extraordinary Gentlemen, Volume III: Century is the third volume of The League of Extraordinary Gentlemen, written by Alan Moore and illustrated by Kevin O'Neill. Co-published by Top Shelf Productions and Knockabout Comics in the US and UK respectively, Century was published in three distinct 72-page squarebound comics.

The League of Extraordinary Gentlemen (LoEG) is a multi-genre, cross over comic book series co-created by writer Alan Moore and artist Kevin O'Neill which began in 1999. The comic book spans four volumes, an original graphic novel, and a spin-off trilogy of graphic novellas. Volume I and Volume II and the graphic novel Black Dossier were published by the America's Best Comics imprint of DC Comics. After leaving the America's Best imprint, the series moved to Top Shelf and Knockabout Comics, which published Volume III: Century, the Nemo Trilogy, and Volume IV: The Tempest. According to Moore, the concept behind the series was initially a "Justice League of Victorian England" but he quickly developed it as an opportunity to merge elements from numerous works of fiction into one world, in a matter akin to the shared fictional universes of Marvel and DC Comics.