OCGS
| Acronym | Definition |
|---|---|
| OCGS | Ontario Council on Graduate Studies (Council of Ontario Universities; Canada) |
| OCGS | Oakland County Genealogical Society (Oakland County, Michigan) |
| OCGS | Oxford and Cambridge Golfing Society |
| OCGS | Oklahoma City Geological Society, Inc. (est. 1921; Oklahoma City, OK) |
| OCGS | Office of the Chief of the General Staff (various locations) |
| OCGS | Oro Christian Grace School (China) |