OCASA
| Acronym | Definition |
|---|---|
| OCASA | Oakland Community After School Alliance (Oakland, CA) |
| OCASA | Ontario College Administrative Staff Association (Canada) |
| OCASA | Off Campus and Apartment Student Association (Rochester Institute of Technology; Rochester, NY) |
| OCASA | Oneida County Area Snowmobile Association (New York) |
| OCASA | Organización Clearing Argentino SA (Spanish: Argentine Clearing Organization SA) |