Mr. Zero may refer to: Mr. Freeze or Mr. Zero, a character in comic books published by DC Comics "Mr. Zero" (song), a song by Keith Relf Mr. Zero, an alias of Urbain Ledoux (1874-1941), activist for the unemployed Mister Zero, pseudonym of John Picard, guitarist in the Canadian band The Kings Mr. Zero, the protagonist of the play The Adding Machine by Elmer Rice Mr. 0, an alias of Sir Crocodile, an antagonist from the manga One Piece
See also Mr. O, a Canadian children's music television series