World 1

World 1 (also written as World One) can refer to:


 * World 1 (Super Mario Bros.) - World One of Super Mario Bros..
 * World 1 (Super Mario Bros.: The Lost Levels) - World One of Super Mario Bros.: The Lost Levels.
 * World 1 (Super Mario Bros. 2) - World One of Super Mario Bros. 2.
 * Grass Land - World One of Super Mario Bros. 3 .
 * Yoshi's Island - World One of Super Mario World.
 * Mushroom Kingdom - World One of Super Mario RPG: Legend of the Seven Stars.
 * World 1 (Super Mario World 2: Yoshi's Island) - World One of Super Mario World 2: Yoshi's Island.
 * World 1 (Yoshi's Island DS) - World One of Yoshi's Island DS.
 * Birabuto Kingdom - World One of Super Mario Land.
 * Rice Beach - World One of Wario Land: Super Mario Land 3.
 * World 1 (New Super Mario Bros.) - World One of New Super Mario Bros..
 * Ladida Plains - World One of Super Princess Peach.
 * Mario Toy Company - World One of Mario vs. Donkey Kong.
 * Lineland - World One of Super Paper Mario.
 * The Terrace - World One of Super Mario Galaxy.
 * World 1 (New Super Mario Bros. Wii) - World One of New Super Mario Bros. Wii.
 * World 1 (Super Mario Galaxy 2) - World One of Super Mario Galaxy 2.
 * Jungle World - World One of DK: King of Swing.
 * Jungle - World One of Donkey Kong Country Returns.
 * World 1 (Super Mario 3D Land) - World One of Super Mario 3D Land.
 * World 1 (New Super Mario Bros. 2) - World One of New Super Mario Bros. 2.
 * World 1 (Paper Mario: Sticker Star) - World One of Paper Mario: Sticker Star.
 * Acorn Plains - World One of New Super Mario Bros. U.