World 6-1

World 6-1 may refer to:
 * World 6-1 in Super Mario Bros..
 * World 6-1 in Super Mario Bros.: The Lost Levels.
 * World 6-1 in Super Mario Bros. 2.
 * World 6-1 in Super Mario Bros. 3.
 * Chocolate Island 1, World 6-1 in Super Mario World.
 * Scary Skeleton Goonies!, World 6-1 in Super Mario World 2: Yoshi's Island.
 * Mecha Castle, World 6-1 in Yoshi's Story.
 * World 6-1 in New Super Mario Bros..
 * World 6-1 in New Super Mario Bros. Wii.
 * World 6-1 in Super Mario 3D Land.
 * World 6-1 in New Super Mario Bros. 2.
 * Gate Cliff, in Paper Mario: Sticker Star.
 * Fuzzy Clifftop, World 6-1 in New Super Mario Bros. U.
 * Mount Fuzzy, World 6-1 in New Super Luigi U.
 * Clear Pipe Cruise, World 6-1 in Super Mario 3D World.
 * Chomp Rock Challenge, World 6-1 in Yoshi's New Island.
 * World 6-1 in Puzzle & Dragons: Super Mario Bros. Edition.
 * Sunken Mario, World 6-1 in Super Mario Maker.
 * Lair of the Smooch Spiders, World 6-1 in Yoshi's Woolly World.
 * World 6-1 in ''Super Mario Maker for Nintendo 3DS.
 * Land of Spikes, World 6-1 in Super Mario Run.