Aion (2003) is an album by the Finnish rock group CMX.

The word Aion (or Aeon) is Ancient Greek for "age, life-force" and also a Finnish verb form meaning "I intend (to do something)".

The album is regarded as something of a concept album by the band and listeners alike; a common theme throughout the songs is the concept of the devil and how this concept manifests itself in the mortal world.

The album was placed at #50 in Finnish rock magazine Soundi's list of "50 most remarkable Finnish rock albums of all time".

All songs written by CMX with lyrics by A. W. Yrjänä.