World 1-1

World 1-1 may refer to:
 * World 1-1 from New Super Mario Bros. 2: Doki Doki Panic!! Edition by MarioFanatic64
 * World 1-1 from New Super Mario Bros. 3 by SKJmin
 * World 1-1 from New Super Mario Bros. PC by Gerry
 * World 1-1 from New Super Mario Bros. 5: Clone Tag Team by MarioFanatic64
 * World 1-1 from New Super Mario Advance 2 by Gerry
 * World 1-1 from New Super Mario Bros. Deluxe! by gridattack
 * World 1-1 from New Super Mario Castle by Arceus
 * Mushroom Plains from New Super Mario Bros. 5: Clone Tag Team 2 by MarioFanatic64
 * Door to the Dream World from New Super Mario Advance + Take 2 by MarioFanatic64
 * World 1-1 from New-ISH Super Mario Bros. DS by Skylander