World 4

World 4 may refer to:


 * World 4 (SMB) – the fourth world from Super Mario Bros..
 * Giant Land – the fourth world of Super Mario Bros. 3.
 * Chai Kingdom – the fourth and final world of Super Mario Land.
 * World 4 (NSMB) – the fourth world in New Super Mario Bros..
 * World 4 (The Lost Levels) – the fourth world in Super Mario Bros.: The Lost Levels.