| Term | Full Form | Category |
|---|---|---|
| OPNA | Oak Park Neighborhood Association | Others |
| OPNA | Ohio Psychiatric Nurse Administrators | Others |
| OPNA | Oklahoma Prevention Needs Assessment | Others |
| OPNA | Orchard Park Neighborhood Association | Others |
| OPNA | Overland Park Neighborhood Association | Others |
| OPNA | Overton Park Neighborhood Association | Others |