XIII

XIII may refer to:

  • 13 (number) or XIII in Roman numerals
  • XIII (comics), a Belgian comic book series by Jean Van Hamme and William Vance
  • XIII (video game), a video game based on the comic book series
  • XIII (miniseries), 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 (album), an album by Mushroomhead
  • Factor XIII, a clotting factor inside the coagulation cascade