| Abbreviation | Definition |
|---|---|
| MOWA | Michigan Onsite Wastewater Association |
| MOWA | Midwest Open Wheel Association |
| MOWA | Military Officers Wives Association |
| MOWA | Minnesota Onsite Wastewater Association |
| MPA | Maine Principals Association |
| MPA | Maine Principals' Association |
| MPA | Malaysian Psychiatric Association |
| MPA | Michigan Petroleum Association |
| MPA | Michigan Pharmacists Association |
| MPA | Midwestern Psychological Association |
| MPA | Minnesota Paralegal Association |
| MPA | Minnesota Psychological Association |
| MPA | Motion Picture Association |
| MPA | Mountain Pickers Association |
| MPAA | Michigan Patient Accounting Association |
| MPAI | Molecular Pathology Association of India |
| MPAO | Mounted Police Association of Ontario |
| MPAS | Magazine Publisher's Association of Singapore |
| MPAU | Motion Picture Association of Utah |
| MPAU | Motion Picture of Association of Utah |