World 7-3

World 7-3 may refer to:
 * World 7-3 (Super Mario Bros.)
 * World 7-3 (Super Mario Bros.: The Lost Levels)
 * World 7-3 (Super Mario Bros. 3)
 * World 7-3 (New Super Mario Bros.)
 * World 7-3 (New Super Mario Bros. Wii)
 * World 7-3 (Super Mario 3D Land)
 * Switchback Hill, World 7-3 in New Super Mario Bros. U.
 * Rainbow Skywalk, World 7-3 in New Super Luigi U.