DMG may refer to:
- DMG Radio Australia, owner of the Nova and Classic Rock radio networks
- .dmg file, the Apple Disk Image file format used in the Mac OS X computer operating system
- Daily Mail and General Trust, an international media company
- Daimler-Motoren-Gesellschaft (Daimler Motors Society, now Daimler AG), a German pioneer carmaker from 1890 to 1926
- Damage, which is abbreviated DMG in role-playing games
- Deckel Maho Gildemeister, one of the largest German machine tool manufacturers and a leading global manufacturer of controlled turning and milling machines
- Deutsche Morgenländische Gesellschaft (German Oriental Society), organization that studies Asia and the Orient
- The Diamante Music Group, a record distributor
- Dimethylglyoxime, an organic chemical used in analysis as a precipitant for palladium or nickel
- Disney Music Group, the record label group owned by The Walt Disney Company
- Dot Matrix Game, the official product code for the original Game Boy handheld video game system
- Dungeon Master's Guide, a rulebook for the game Dungeons & Dragons
- Dark Magician Girl, a card in the Yu-Gi-Oh! trading card game
- Dimethylglycine, a derivative of the amino acid glycine
- D.M.G. Grupo Holding S.A., a controversial Colombian company
- Dill Mill Gayye, a Hindi television serial on the Indian channel STAR One
- DMG, a rapper from Saint Paul, Minnesota
- Dialogic Media Gateway, a network appliance that merges traditional PSTN technology with IP networks