World 6-4

World 6-4 may refer to:
 * World 6-4 (Super Mario Bros.)
 * World 6-4 (Super Mario Bros.: The Lost Levels)
 * World 6-4 (Super Mario Bros. 3)
 * Tap-Tap the Red Nose's Fort, World 6-4 in Super Mario World 2: Yoshi's Island.
 * World 6-4 (New Super Mario Bros.)
 * World 6-4 (New Super Mario Bros. Wii)
 * World 6-4 (Super Mario 3D Land)
 * World 6-4 (New Super Mario Bros. 2)
 * Light Blocks, Dark Tower, World 6-4 in New Super Mario Bros. U.
 * Light-Up-Lift Tower, World 6-4 in New Super Luigi U.