RIWG
| Acronym | Definition |
|---|---|
| RIWG | Regional Issues Working Group (now Oil Sands Developers Group; Canada) |
| RIWG | Regional Infrastructure Working Group (Standing Committee on Regional Development; Australia) |
| RIWG | Rhode Island Wing (Civil Air Patrol) |
| RIWG | Regional Initiatives Working Group (Australia) |
| RIWG | Requirements Integration Working Group |