A traitor is a person who commits treason.

Traitor, The Traitor or Traitors may also refer to:

• Traitor (film), a 2008 spy thriller starring Don Cheadle
• The Traitor (1936 German film), the English title for the film Verräter directed by Karl Ritter
• The Traitor (1936 American film), directed by Sam Newfield
• The Traitor (1957 film), a British film noir
• The Traitor (2019 film), an Italian film

• Traitor (Star Wars novel), a 2002 novel by Matthew Stover
• The Traitor (Dixon novel), a 1907 novel by Thomas Dixon Jr., with a 1908 dramatization
• The Traitor (Walters novel), a 2002 Guy Walters novel
• The Traitor (play), a 1631 play by James Shirley
• The Traitor (1718 play), a play by Christopher Bullock, reworking Shirley's original
• The Traitor, a 2007 fantasy novel by Michael Cisco
• The Traitor, a 2007 spy thriller by Stephen Coonts
• The Traitor Baru Cormorant, a 2015 fantasy titled The Traitor in the UK
• Traitor (Daisley novel), a novel by Stephen Daisley

• Traitors (album), by Misery Index
• "Traitor" (song), by Olivia Rodrigo
• "Traitor", a song by Motörhead from Rock 'n' Roll
• "Traitor", a song by Renegade Soundwave from Soundclash
• "Traitor", a song by the Sugarcubes from Life's Too Good
• "The Traitor", a 1979 song by Leonard Cohen from Recent Songs
• "The Traitor", a 1985 song by Minimal Compact

• Traitors (Channel 4 TV series), a 2019 series broadcast on the UK's Channel 4 and Netflix

• Traitor (TV drama), a 1971 British television play by Dennis Potter
• "Traitor" (American Horror Story)
• "Traitor" (Captain Scarlet)
• "Traitor" (The Secret Circle)
• "Traitor" (The Transformers)
• "The Traitor", a season 2 episode of Voltron
• "The Traitor" (The Amazing World of Gumball)
• "The Traitor" (G.I. Joe: A Real American Hero)
• "The Traitor", a season 2 episode of Dungeons & Dragons

• Traitor (Thieves' World), a 1982 fantasy role-playing game adventure for Thieves' World

• Traiteur (disambiguation)
• The Traitors (disambiguation)
• Treason (disambiguation)
• Treta, a Sanskrit word relating to Hinduism