init. Companion of the http://en.wikipedia.org/wiki/Order%20of%20St%20Michael%20and%20St%20George, a British honour.
CMG may refer to:
- CMG-1 (and CMG-2) machine gun
- Collectible miniatures game
- Companion of the Order of St Michael and St George, a British and Commonwealth honour
- Control Moment Gyroscope, orbital facility component
- Corumbá International Airport (IATA airport code)