| Acronym | Definition |
|---|
| OCAA➣Ontario Colleges Athletic Association |
| OCAA➣Ontario Clean Air Alliance (Ontario, Canada) |
| OCAA➣Oklahoma City-Ada-Atoka Railway Company |
| OCAA➣Omnibus Consolidated Appropriations Act (Public Law 104-208) |
| OCAA➣Oxfam Community Aid Abroad, Australia |
| OCAA➣Orange Community Athletic Association (Orange Village, OH) |
| OCAA➣Overseas Children's Aid Association (Australia) |
| OCAA➣Onondaga Council on Alcoholism Addictions (Onondaga County, NY) |