OPPL
| Acronym | Definition |
|---|---|
| OPPL | Oak Park Public Library |
| OPPL | Ouachita Parish Public Library (Louisiana) |
| OPPL | Ontario Paintball Players League (Ontario, Canada) |
| OPPL | Office of Professional Preparation and Licensure (Purdue University; West Lafayette, IN) |
| OPPL | Office of Program and Public Liaison (US NIH) |
| OPPL | Osmotic Pressure of Plasma (anesthesiology) |