World 3-4

World 3-4 may refer to:
 * World 3-4 in Super Mario Bros..
 * World 3-4 in Super Mario Bros.: The Lost Levels.
 * World 3-4 in Super Mario Bros. 2.
 * World 3-4 in Super Mario Bros. 3.
 * Vanilla Dome 4, World 3-4 in Super Mario World.
 * Prince Froggy's Fort, World 3-4 in Super Mario World 2: Yoshi's Island.
 * Frustration, World 3-4 in Yoshi's Story.
 * Bessie Bass's Battleship, World 3-4 in Yoshi's Island DS.
 * World 3-4 in New Super Mario Bros. Wii.
 * Damp Dungeon, World 3-4 in Donkey Kong Country Returns.
 * World 3-4 in Super Mario 3D Land.
 * World 3-4 in New Super Mario Bros. 2.
 * Strike Lake, World 3-4 of Paper Mario: Sticker Star.
 * Urchin Shoals, World 3-4 in New Super Mario Bros. U.
 * The Great Geysers, World 3-4 in New Super Luigi U.
 * Pretty Plaza Panic, World 3-4 in Super Mario 3D World.
 * Slime Drop Drama, World 3-4 in Yoshi's New Island.
 * World 3-4 in Puzzle & Dragons: Super Mario Bros. Edition.
 * Spinning Boo Buddies, World 3-4 in Super Mario Maker.
 * Big Montgomery's Bubble Fort, World 3-4 in Yoshi's Woolly World.
 * World 3-4 in ''Super Mario Maker for Nintendo 3DS.
 * Fire Bar Castle! Youch!, World 3-4 in Super Mario Run.