World

A World is a group of levels in a Mario game. In Super Mario Bros. and Super Mario Bros.: The Lost Levels, each world always has exactly four levels. However, starting in Super Mario Bros. 3, most games have a varying number of levels. In the three-dimensional Mario games, worlds are no longer used; now each level stands alone (but each level is sometimes referred to as a world), and the missions are either referred to as stars or episodes. In earlier games, worlds were simply numbered "World 1", "World 2", etc. In Super Mario Bros. 3, they have distinct names. Super Mario World has no clear separation of worlds on the world map.

In general terms, a "world" refers to any large area of land and space marked off from other regions. As such, "world" may refer to a politically or geographically distinct region of land (such as Desert Land or Chocolate Island), a planet (such as Mushroom World), or even an entire universe (such as the Mushroom Universe).

Super Mario Bros.

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8

Super Mario Bros.: The Lost Levels

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8
 * World 9
 * World A
 * World B
 * World C
 * World D

Super Mario Bros. 2

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7

Super Mario Bros. 3

 * Grass Land (World 1)
 * Desert Land (World 2)
 * Aqua Land (World 3)
 * Giant Land (World 4)
 * Sky Land (World 5)
 * Ice Land (World 6)
 * Pipe Land (World 7)
 * Dark Land (World 8)
 * Warp Zone (World 9)
 * World-e (Super Mario Advance 4 only) (Bonus World)

Super Mario World

 * Yoshi's Island (World 1)
 * Donut Plains (World 2)
 * Vanilla Dome (World 3)
 * Twin Bridges (World 4)
 * Forest of Illusion (World 5)
 * Chocolate Island (World 6)
 * Valley of Bowser (World 7)
 * Star World (Bonus World)
 * Special World (Bonus World)

Super Mario World 2: Yoshi's Island

 * World 0 (Super Mario Advance 3 only) (Tutorial World)
 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6

New Super Mario Bros.

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5
 * World 6
 * World 7
 * World 8

Yoshi's Island DS

 * World 1
 * World 2
 * World 3
 * World 4
 * World 5