| Acronym | Definition |
|---|
| OAPC | Ontario Association of Paramedic Chiefs (formerly Association of Emergency Medical Services of Ontario; Ontario, Canada) |
| OAPC | Ontario Association of Patient Councils (Ontario, Canada) |
| OAPC | Ordinance on Air Pollution Control (Switzerland) |
| OAPC | Office of Alien Property Custodian (est. 1942) |
| OAPC | Ohio Asphalt Paving Conference |
| OAPC | Office of AIDS Policy Coordination (New York City Department of Health and Mental Hygiene) |
| OAPC | Open Arms Pregnancy Center (DeWitt, IA) |
| OAPC | Osteoporosis Action Plan Committee (Canada) |