OCCSA
| Acronym | Definition |
|---|---|
| OCCSA | Ohio Correctional and Court Services Association (est. 1928; Columbus, OH) |
| OCCSA | Oregon Community College Student Association (est. 1962) |
| OCCSA | Orange County Chiefs and Sheriffs Association (California) |
| OCCSA | Ovarian Cancer Cell Surface Antigen (gynecological oncology) |
| OCCSA | Ohio Collegiate Computing Services Association (Miami University; Oxford, OH) |