MGIA
| Acronym | Definition |
|---|---|
| MGIA | Michigan Green Industry Association |
| MGIA | Midwest Gang Investigators Association (est .1987; Omaha, NE) |
| MGIA | My Getaway In Audio (band) |
| MGIA | Multi-Grid Iterative Approach |
| MGIA | Municipal Government Investment Associates, Inc. (California) |
| MGIA | Modified General Inversion Algorithm |