ADG or Adg may refer to:
- Adg, a village in Iran
Aviation
- Aerospace, Defense & Government
- Airfield Defence Guards
- IATA airport code for Lenawee County Airport in Adrian, State of Michigan, USA
Symbols and initialisms
- Active Data Guard
- Acyclic Directed Graph
- Additional Director General of Police, senior police rank in India
- ADG, Asociación Deportiva Guanacasteca, Costa Rican soccer team
- Advanced Data Guarding
- Air-driven generator
- Alpha Delta Gamma, a national fraternity
- Amlan Das Gupta, Indian scholar
- Andegerebinha dialect, an Aboriginal language of Australia (ISO 639-3 code)
- Art Directors Guild
- Aubrey de Grey
- Australian Directors' Guild
- Autonomous Design Group, an anti-capitalist artist collective
- A US Navy hull classification symbol: Degaussing ship (ADG)