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
See also Four (disambiguation)