World 1-1

World 1-1 may refer to:


 * World 1-1 (Super Mario Bros.)
 * World 1-1 (Super Mario Bros.: The Lost Levels)
 * World 1-1 (Super Mario Bros. 2)
 * Yoshi's Island 1, World 1-1 in Super Mario World
 * Make Eggs, Throw Eggs, World 1-1 in Super Mario World 2: Yoshi's Island
 * Ba-dum BUM!, World 1-1 in Yoshi's Island DS
 * World 1-1 (Super Mario Bros. 3)
 * World 1-1 (New Super Mario Bros.)
 * World 1-1 (New Super Mario Bros. Wii)
 * World 1-1 (Super Mario 3D Land)
 * World 1-1 (New Super Mario Bros. 2), the first level in New Super Mario Bros. 2
 * Acorn Plains Way, World 1-1 in New Super Mario Bros. U
 * Waddlewing Warning!, World 1-1 in New Super Luigi U