World 9-1

World 9-1 may refer to:
 * World 9-1 in Super Mario Bros.: The Lost Levels.
 * World 9-1 in New Super Mario Bros. Wii.
 * Spine-Tingling Spine Coaster, World 9-1 of New Super Mario Bros. U.
 * Spine Coaster Connections, World 9-1 of New Super Luigi U.
 * Jump For It!, World 9-1 in Super Mario Maker.
 * World 9-1 in ''Super Mario Maker for Nintendo 3DS.