MGWA
| Acronym | Definition |
|---|---|
| MGWA | Middle Grades Writing Assessment |
| MGWA | Metropolitan Golf Writers Association (Elmsford, NY) |
| MGWA | Minnesota Ground Water Association (volunteer organization; White Bear Lake, MN) |
| MGWA | Montana Game Wardens Association (Helena, MT) |
| MGWA | Michigan Ground Water Association, Inc. |
| MGWA | McGillivray's Warbler (bird species Oporornis tolmiei) |