A treble in association football is achieved when a club team wins three trophies in a single season. A continental treble involves winning the club's national league competition, main national cup competition, and main continental trophy. A domestic treble involves winning three national competitions—normally the league title, the primary cup competition, and one secondary competition, such as a secondary cup or state-level league.

Competitions which consist of a single match or a two-leg match are not normally counted as part of a treble (e.g., the FA Community Shield, Supercopa de España, Trophée des Champions, DFL-Supercup, UEFA Super Cup, Recopa Sudamericana, FIFA Club World Cup, Intercontinental Cup, and others).