| Acronym | Definition |
|---|
| OEA | Organizacion de Estados Americanos (OAS in English) |
| OEA | Office of External Affairs |
| OEA | Organização dos Estados Americanos (Portuguese: Organization of American States) |
| OEA | Oregon Education Association |
| OEA | Ohio Education Association |
| OEA | Office of Environmental Adjudication (Indiana) |
| OEA | Office of Economic Adjustment |
| OEA | Oklahoma Education Association |
| OEA | Oxygen Enriched Air |
| OEA | Ombudsman for Estate Agents (UK) |
| OEA | Ontario Energy Association (Canada) |
| OEA | Office of The Employment Advocate (Australia) |
| OEA | Office of Education Accountability |
| OEA | Office of Energy Assurance (DOE) |
| OEA | Office of Employee Appeals |
| OEA | Omron Electronics Asia (Hong Kong) |
| OEA | Okaya Electric America |
| OEA | Oil, Engine, Arctic (US Army) |
| OEA | Ottawa Economics Association |
| OEA | Open Enforcement Action |
| OEA | O'Neal Airport (Vincennes, Indiana, USA) |
| OEA | Operating Environment Architecture |
| OEA | Ocean Executive Agent |
| OEA | Operation and Easement Agreement (real estate leasing) |
| OEA | Office of Extramural Activities (NIAAA) |
| OEA | Office Executive Association |
| OEA | Organization of European Aluminium Refiners & Remelters |
| OEA | Organizational Expense Account |
| OEA | Oxygen Evolving Anode |