World 5-6

World 5-6 may refer to:
 * World 5-6 (Super Mario Bros. 3)
 * Welcome to Cloud World, World 5-6 in Super Mario World 2: Yoshi's Island.
 * Find the Number Ball!, World 5-6 in Super Mario World 2: Yoshi's Island.
 * World 5-6 (New Super Mario Bros. 2)
 * Seesaw Bridge, World 5-6 in New Super Mario Bros. U.
 * Sumo Bro Bridge, World 5-6 in New Super Luigi U.