World 5-1

World 5-1 may refer to:
 * World 6-1 (Super Mario Bros.)
 * World 6-1 (Super Mario Bros.: The Lost Levels)
 * World 5-1 (Super Mario Bros. 2)
 * World 5-1 (Super Mario Bros. 3)
 * BLIZZARD!!!, World 5-1 in Super Mario World 2: Yoshi's Island.
 * Rompin', Stompin' Chomps, World 5-1 in Yoshi's Island DS.
 * World 5-1 (New Super Mario Bros.)
 * World 5-1 (New Super Mario Bros. Wii)
 * World 5-1 (Super Mario 3D Land)
 * World 5-1 (New Super Mario Bros. 2)
 * Jungle of the Giants, World 5-1 in New Super Mario Bros. U.
 * Giant Swing-Along, World 5-1 in New Super Luigi U.
 * Sunshine Seaside, World 5-1 in Super Mario 3D World.