Convention may refer to:
Convention (norm), a custom or tradition, a standard of presentation or conduct
Treaty, an agreement in international law
Convention (political norm), uncodified legal or political tradition
Convention (meeting), meeting of a (usually large) group of individuals and/or companies in a certain field who share a common interest
Fan convention, a gathering of fans of a particular media property or genre
Anime convention, centered on Japanese anime and manga
Comic book convention centered on comic books
Gaming convention, centered on role-playing games, collectible card games, miniatures wargames, board games, video games, and the like
Magic convention, centered on magic and the magic industry
Tattoo convention, a meeting and exhibition for tattoo practitioners and enthusiasts from different shops and areas, as well as anyone who wishes to see the world of tattooing up close
Furry convention, centered on anthropomorphic animals; fictional non-human animal creatures with human characteristics
Political convention, a formal gathering of people for political purposes
Religious convention, a group of churches that share a common liturgy and set of beliefs such as the Southern Baptist Convention.
Trade fair
Bridge convention, a term in the game of bridge
Convention station, on Line 12 of the Paris Metro in the 15th arrondissement
"The Convention" (The Office episode)
"Convention" (Malcolm in the Middle episode)