| MWAA | Maine West Alumni Association 
| Others |
| MWAA | Mall Walker's Association of America
| Others |
| MWAA | Men Working Against Abuse (Seattle, WA)
| Others |
| MWAA | Mental Wellness Awareness Association
| Others |
| MWAA | Metropolitan Washington Airport Authority
| Others |
| MWAA | Metropolitan Washington Airports Authority
| Others |
| MWAA | Mid-West Appraisers Association (Kearney, NE)
| Others |
| MWAA | Midwest Water Analysts Association
| Others |
| MWAA | Midwestern Workshop on Asymptotic Analysis
| Others |
| MWAA | Missouri Walleye Anglers Association
| Others |
| MWAA | Movers' and Warehousemens' Association of America
| Others |
| MWAA | Multicast Wavelength Assignment Algorithm
| Others |