Black Gate or Blackgate may refer to:

Fictional

• Blackgate Penitentiary, a fictional prison in the DC Comics universe
• Ultima VII: The Black Gate, Part I of the computer game Ultima VII
• Black Gate or Morannon in J. R. R. Tolkien's Middle-earth, an entrance to Mordor
• Batman: Arkham Origins Blackgate, a 2013 video game
• Black Gate (manga), a Japanese manga written and illustrated by Yukiko Sumiyoshi
• The Black Gate, a 1919 American silent film produced by Vitagraph and starring Ruth Clifford

Other uses

• The Black Gate (The Castle, Newcastle), a building at the archeological site The Castle, Newcastle upon Tyne, England
• Black Gate (capacitor), a brand of capacitor
• Black Gate (magazine), a fantasy and science fiction magazine