| Acronym | Meaning |
| AOA | Abbreviated Operational Assessment |
| AOA | Abort Once Around |
| AOA | Add on Armor (Army) |
| AoA | Administration on Aging (US Department of Health and Human Services) |
| AOA | Advise of Obligation Authority |
| AoA | Agency of Agriculture (Vermont) |
| AOA | Agency on Aging (various locations) |
| AOA | Airborne Optical Adjunct |
| AOA | Aircraft Operations Area (FAA) |
| AOA | Airport Operations Area (aviation) |
| AOA | American Ordnance Association |
| AOA | Amphibious Objective Area |
| AOA | Amphibious Operating Area |
| AOA | Amphibious Operations Area |
| AOA | Analysis of Alternatives (formerly COEA) |
| AOA | Angle Of Arrival |
| AOA | Angle Of Attack |
| AOA | Annual Operating Agreement |
| AOA | Annual Operating Area |
| AOA | Area of Action (US DoD) |
| AOA | Area Office Augmentee |
| AOA | Area Operating Agreement |
| AOA | Area Originating Authority |
| AOA | Army Ordnance Association (est. 1919) |
| AOA | Asia-Oceania-Africa (region) |
| AOA | Assembly Operations Assessment |
| AOA | Assist Other Agency |
| AOA | At or Above |
| AOA | Authorized OECD (Organization for Economic Co-operation and Development) Approach (taxes) |