World 2-1

World 2-1 may refer to:
 * World 2-1 in Super Mario Bros..
 * World 2-1 in Super Mario Bros.: The Lost Levels.
 * World 2-1 in Super Mario Bros. 2.
 * World 2-1 in Super Mario Bros. 3.
 * Donut Plains 1, World 2-1 in Super Mario World.
 * Visit Koopa And Para-Koopa, World 2-1 in Super Mario World 2: Yoshi's Island.
 * Bone Dragon Pit, World 2-1 in Yoshi's Story.
 * World 2-1 in New Super Mario Bros..
 * Baby DK, the Jungle King!, World 2-1 in Yoshi's Island DS.
 * World 2-1 in New Super Mario Bros. Wii.
 * World 2-1 in Super Mario 3D Land.
 * World 2-1 in New Super Mario Bros. 2.
 * Drybake Desert, in Paper Mario: Sticker Star.
 * Stone-Eye Zone, World 2-1 in New Super Mario Bros. U.
 * Spike's Tumbling Desert, World 2-1 in New Super Luigi U.
 * Conkdor Canyon, World 2-1 in Super Mario 3D World.
 * Koopa Canyon, World 2-1 in Yoshi's New Island.
 * World 2-1 in Puzzle & Dragons: Super Mario Bros. Edition.
 * Ghost House, World 2-1 in Super Mario Maker.
 * Across the Fluttering Dunes, World 2-1 in Yoshi's Woolly World.
 * World 2-1 in Mario Party: Star Rush.
 * World 2-1 in ''Super Mario Maker for Nintendo 3DS.
 * Ghost-Door Deception, World 2-1 in Super Mario Run.