XIII
XIII may refer to:

13 (number) or XIII in Roman numerals
13th century in Roman numerals
XIII (comics), a Belgian comic book series by Jean Van Hamme and William Vance
XIII (2003 video game), a 2003 video game based on the comic book series
XIII (2020 video game), a remake of the 2003 video game
XIII: The Conspiracy, a TV miniseries based on the comic book series and game of the same title
XIII: The Series, a 2011 TV series based on the comic book series and miniseries
XIII (Rage album), 1998
XIII (Mushroomhead album), 2003
XIII (TNT album), 2018
Factor XIII, a clotting factor inside the coagulation cascade
Rugby league, still often known as just XIII in France due to the name Rugby once being forbidden for the league code

See also
Thirteen (disambiguation)
Number 13 (disambiguation)
Red XIII, a character from Final Fantasy VII
Organization XIII, a fictional organization from the Kingdom Hearts series
Final Fantasy XIII, a 2009 video game
The Land Before Time XIII: The Wisdom of Friends, a 2007 film
The King of Fighters XIII, a 2010 fighting video game