World 1-2

World 1-2 may refer to:
 * The second stage in the first world in Super Mario Bros.
 * The second stage in the first world in Super Mario Bros. 3
 * The second stage in the first world in New Super Mario Bros.
 * The second stage in the first world in New Super Mario Bros. Wii
 * The second stage in the first world in Super Mario 3D Land
 * The second stage in the first world in Puzzle & Dragons: Super Mario Bros. Edition