What is the fictional planet used as League of Legends' setting?

The fictional planet used as League of Legends’ setting is Runeterra.

Runeterra is the world that provides the shared setting for League’s champions, regions, conflicts, and expanding stories. Its name is often associated with the game’s broader lore rather than with a single match map: Summoner’s Rift and Howling Abyss are battlefields within the game, while Runeterra is the fictional world in which many of the characters and cultures exist.

The setting developed significantly as Riot Games revised League’s early storytelling. The original presentation leaned on the idea of champions being controlled by “summoners” in organized Fields of Justice. Riot later moved away from that framework and built a more expansive world with independent characters, nations, magic systems, and historical conflicts. Major regions include Demacia, Noxus, Piltover, Zaun, Ionia, and the Freljord.

Piltover and Valoran are common sources of confusion. Piltover is one region or city within the setting, while Valoran has been used for a broader continent or geographic area in League lore. Azeroth belongs to Warcraft, not League of Legends. Runeterra also supports stories outside the core game, including comics, animated fiction, and spin-off titles.