| Acronym | Definition |
|---|
| OPFA | Ontario Professional Foresters Association |
| OPFA | One Parent Families Association |
| OPFA | Opposition Personal Funds Amount (US Federal Election Commission) |
| OPFA | Oxfordshire Playing Fields Association (UK) |
| OPFA | One Parent Family Association |
| OPFA | Ontario Professional Firefighters Association (Canada) |
| OPFA | On Pourrait Faire Autrement |
| OPFA | Oregon Pacific Financial Advisors, Inc. |
| OPFA | Ordered Preferred First Algorithm |
| OPFA | Outback Parents and Friends Association (Australia) |
| OPFA | Ontario Police Fitness Award (Canada) |