Convention may mean:

• Convention (norm), a custom or tradition, a standard of presentation or conduct
  • Treaty, an agreement in international law
• Convention (meeting), meeting of a (usually large) group of people and/or companies who share a common interest
  • Fan convention, a gathering of fans of a particular genre
  • Gaming convention, has role-playing games, collectible card games, miniatures wargames, board games, video games, and the like
  • Political convention, a formal gathering of people for political purposes
• Trade fair
• Bridge convention, a term in the game of bridge
• Convention (Paris Métro), a station on line 12 of the Paris Métro in the 15th arrondissement
• "The Convention" (The Office episode)
• "Convention" (Malcolm in the Middle episode)