| Acronym | Meaning |
| AG | Accountant General |
| AG | Agent General |
| AG | Attorney General |
| AG | Adjutant General's Corps |
| AG | Adjutant-General |
| AG | Administrative Guide |
| AG | Administrator General |
| AG | Advocate General (various nations) |
| AG | Aerographer's Mate (USN Rating) |
| AG | Agrigento, Sicilia (Italian province) |
| AG | Air Group (aircraft carriers) |
| AG | Air-to-Ground |
| AG | Airlift Group |
| AG | Amtsgericht (German district court) |
| AG | Antenna Group |
| AG | Anti-Ground |
| AG | Area Governor |
| AG | Armed Guard |
| AG | Army Group |
| AG | Army Guidance |
| AG | Arresting Gear |
| AG | Assemblée Générale (French: General Assembly) |
| AG | Assistance Group |
| AG | Assistance Groups |
| AG | Attack Group |
| AG | Attack Guidance |
| AG | Attitude Gyro (NASA) |
| AG | Auditor General (Canada) |
| AG | Autorità Giudiziaria (Italian: Judicial Authority) |
| AG | Auxiliary Generator |
| AG | Miscellaneous Auxiliary (US Navy) |