World 3-6

World 3-6 may refer to:
 * World 3-6 in Super Mario Bros. 3.
 * The Cave of Harry Hedgehog, World 3-6 in Super Mario World 2: Yoshi's Island.
 * Use the Magnet to Get Rich Quick!, World 3-6 in Yoshi's Island DS.
 * Ukiki Trouble in Clawdaddy Cove, World 3-6 in Yoshi's New Island.
 * World 3-6 in Puzzle & Dragons: Super Mario Bros. Edition.
 * A-Mazing Post Pounding, World 3-6 in Yoshi's Woolly World.