CMG may refer to:
- CMG-1 machine gun
- CMG-2 machine gun
- CMG-1-Gene, see IFT74
- CMG-2-Gene, see ANTXR2
- Capitol Music Group
- Case mix group, medical-care accounting mechanism
- Collectible miniatures game
- Companion of the Order of St Michael and St George, a British and Commonwealth honour
- Control Moment Gyroscope, orbital facility component
- Cystometrography, clinical test often accompanying intravenous pyelogram
Read more about CMG: Businesses