World 3-4

World 3-4 may refer to:
 * World 3-4 (Super Mario Bros.)
 * World 3-4 (Super Mario Bros. 3)
 * Prince Froggy's Fort, World 3-4 in Super Mario World 2: Yoshi's Island.
 * Bessie Bass's Battleship, World 3-4 in Yoshi's Island DS.
 * World 3-4 (New Super Mario Bros.)
 * World 3-4 (New Super Mario Bros. Wii)
 * World 3-4 (Super Mario 3D Land)
 * World 3-4 (New Super Mario Bros. 2)
 * Urchin Shoals, World 3-4 in New Super Mario Bros. U.
 * The Great Geysers, World 3-4 in New Super Luigi U.