World 8-1

World 8-1 may refer to the following:
 * World 8-1 (Super Mario Bros.)
 * World 8-1 (Super Mario Bros.: The Lost Levels)
 * World 8-1 (Super Mario Bros. 3)
 * World 8-1 (New Super Mario Bros.)
 * World 8-1 (New Super Mario Bros. Wii)
 * World 8-1 (Super Mario 3D Land)
 * Meteor Moat, World 8-1 in New Super Mario Bros. U.
 * Magma Moat, World 8-1 in New Super Luigi U.