| OPRA | Objectives Possibilities Requirements and Alternatives 
| Others |
| OPRA | Obsolete Property Rehabilitation Act
| Others |
| OPRA | Occupational Pensions Regulatory Authority
| Others |
| OPRA | Office of Pre-award Research Administration
| Others |
| OPRA | Ohio Parks and Recreation Association
| Others |
| OPRA | Ohio Provider Resource Association
| Others |
| OPRA | Ohio Providers Resource Association
| Others |
| OPRA | Olympic Peninsula Rowing Association
| Others |
| OPRA | One Piece Reduced Area
| Others |
| OPRA | Online Press Release Archive
| Others |
| OPRA | Open Public Records Act
| Others |
| OPRA | Operator and Pollution Risk Appraisal
| Others |
| OPRA | Operator Pollution Risk Appraisal
| Others |
| OPRA | Options Price Reporting Authority
| Others |
| OPRA | Options Reporting Authority
| Others |
| OPRA | Order Processing and Requisition Accelerator
| Others |
| OPRA | Organization Public Relationship Assessment
| Others |
| OPRA | Oriented Point Relation Algebra
| Others |
| OPRA | Ottawa Photonics Research Alliance
| Others |
| OPRA | Outdoor Programs Recreation and Athletics
| Others |
| OPRA | Outdoors Program Recreational Athletics
| Others |
| OPRA | Outdoors Program/Recreational Athletics
| Others |