| MIWA | Maine Injured Workers Association 
| Others |
| MIWA | Marine and Inland Waters Administration (State Environmental Service; Ministry of Environment; Latvia)
| Others |
| MIWA | Materials Institute of Western Australia
| Others |
| MIWA | Merritt Island Wildlife Association
| Others |
| MIWA | Michelangelo International Wine Awards
| Others |
| MIWA | Motor Industry Workshop Association
| Others |
| MIWA | Municipal and Industrial Water Authority (Texas)
| Others |