DG may stand for:
- Dark Galaxy
- Data General (dg.com)
- Decigram
- Decomposed granite
- Defense Guidance (US DoD)
- Dei Gratia ("by the grace of God")
- Delta Gamma (sorority)
- Delta Green
- Democracy game (Civilization)
- Democracy and Governance (USAID)
- Density gradient
- Dentate Gyrus
- Depth gauge
- Deutsche Genossenschaftsbank
- Diesel generator
- Differential geometry
- Digital gazetteer
- Digital government
- Diode gate
- Direct generation
- Directeur Général
- Directeur-Generaal
- Directional gyroscope
- Director General
- Disturbed gum (philately)
- Dollar General
- Glaser-Dirks Flugzeugbau