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

• Four (disambiguation)

This disambiguation page lists articles associated with the title Number Four.
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