OSEA
| Acronym | Definition |
|---|---|
| OSEA | Oregon School Employees Association |
| OSEA | Ontario Sustainable Energy Association (Canada) |
| OSEA | Offshore South East Asia (oil and gas industry) |
| OSEA | Oklahoma Society of Enrolled Agents (Oklahoma City, OK) |
| OSEA | Ohio Student Education Association (Lexington, OH) |
| OSEA | Organization for Synthetic Environment Architecture |
| OSEA | Office of Strategic Environmental Analysis (US EPA) |