Number Four

Number Four may refer to:


 * 4 (number), a number, numeral, and glyph
 * A hamlet in the town of Watson, New York
 * #4, the pseudonym of American musician Jim Root, when performing with Slipknot
 * A character from the Earthworm Jim video games and animated series
 * Numbuh Four, a character from Codename: Kids Next Door
 * A predominantly defensive position in polo
 * Jean Béliveau (1931–2014), Canadiens hockey player, frequently known by his sweater number, number 4
 * A character also known as Simon in the reimagined Battlestar Galactica
 * A character in the 2011 film I Am Number Four, based on the 2010 book of the same name
 * "Number Four" (single), a 2013 single by My Chemical Romance
 * Number 4 (album), also styled as #4, a 2005 album by Ling Tosite Sigure