An Ultimatum is a demand whose fulfillment is backed up by a threat.
Ultimatum may also refer to:
Comics Ultimatum (comics), a 2008 Marvel Comics crossover event within the Ultimate Marvel imprint ULTIMATUM, a fictional terrorist organization in Marvel Comics Ultimatum, an alternative version of Marvel Comics character Miles Morales Ultimatum, an Image Comics character member of Vicious Circle
Music Ultimatum (EP), a 2005 EP by The Long Winters Ultimatum (Nightstick album) Ultimatum (Australian band), an Australian hardcore band Ultimatum (American band), an American heavy metal band "Ultimatum", a song by Shaggy from his 2005 album Clothes Drop "Ultimatum", a song by Ten Foot Pole "Ultimatum", an album by music composer Jesper Kyd for Motion Picture Advertising "Ultimatum", a song by Disclosure featuring Fatoumata Diawara
Film and television Ultimatum (game show), a Quebec quiz show The Bourne Ultimatum (film), a 2007 film starring Matt Damon as Jason Bourne "Ultimatum", an episode of the animated series Justice League Unlimited "Ultimatum" (The Office), an episode of The Office The Ultimatum, a Singaporean Chinese TV drama The Ultimatum, a dating reality television show on Netflix Eternal Theater, a 2010 film formerly titled Ultimatum Ultimatum (1938 film), a 1938 film directed by Robert Wiene Ultimatum (1973 film), a Canadian drama film directed by Jean Pierre Lefebvre Ultimatum (1984 film), a 1984 film directed by , featuring the 1982 seizure of the Polish embassy in Bern Ultimatum (1994 film), a 1994 film directed by Cirio H. Santiago Ultimatum (2001 film), a 2001 film directed by Yuen Wah Ultimatum (2009 film), a 2009 film directed by Alain Tasma "Ultimatum", the forty-first episode of Code Lyoko "The Ultimatum", the thirty-seventh episode of Avatar: The Legend of Korra
Other Ultimatum game, an experimental economics game in which two parties interact anonymously and only once, so reciprocation is not an issue Ultimatum, a 1973 novel by Richard Rohmer Ultimatum (book), a 2009 book by Matthew Glass HMS Ultimatum (P34), a Royal Navy U-class submarine