| Acronym | Definition |
|---|
| OCSA | Orange County School of the Arts (Santa Ana, CA) |
| OCSA | Ontario Community Support Association (Canada) |
| OCSA | Oregon Chimney Sweeps Association |
| OCSA | Ontario Convenience Stores Association |
| OCSA | Office of the Chief Scientific Adviser (Scotland, UK) |
| OCSA | Off Campus Student Association |
| OCSA | Outstanding Community Service Award (various organizations) |
| OCSA | Olds College Students Association |
| OCSA | Oregon Creative Services Alliance |
| OCSA | Outstanding Customer Service Award |
| OCSA | Osceola County School for the Arts |
| OCSA | Online Casino Scam Alert |
| OCSA | Ontario Committee on Student Affairs |
| OCSA | Overseas Chinese Student Association |
| OCSA | Oregon Corinthian Sailing Association (Portland, Oregon) |
| OCSA | Oakland County Superintendents Association |
| OCSA | Orange County Soaring Association |
| OCSA | Oregon Community Sports Arena (Oregon, WI) |
| OCSA | Osceola School for the Arts (Kissimmee, FL) |
| OCSA | Office, Chief of Staff of the Army |
| OCSA | Ohio Charter Schools Association |
| OCSA | OnBase Certified System Administrator (professional credential) |
| OCSA | Oklahoma Campus Safety Association |
| OCSA | Oblate Congregation of St Augustine |
| OCSA | Ordinary Circular Slot Antenna |
| OCSA | Oracle Client Software Agent |
| OCSA | Outcrop or Coal Storage Area |
| OCSA | Orange County Sportsman's Association (Orlando, FL) |