World 6 is the sixth world that appears in Super Mario 3D World.
World 6 is mainly a cloud-based world.
- World 6-B: Fire Bros. Hideout #3
- World 6-1: Clear Pipe Cruise
- World 6-2: Spooky Seasick Wreck
- World 6-3: Hands-On Hall
- World 6-4: Deep Jungle Drift
- World 6-A: Prince Bully Blockade
- World 6-5: Ty-Foo Flurries
- World 6-6: Bullet Bill Base
- World 6-7: Fuzzy Time Mine
- World 6-Castle: Bowser's Bob-omb Brigade
- World 6-C: Motley Bossblob's Big Battle
- World 6-Mystery House: Mystery House Throwdown