MMRG
| Acronym | Definition |
|---|---|
| MMRG | Moose Mountains Regional Greenways (New Hampshire) |
| MMRG | Mid Michigan Radio Group (radio stations; Holt, MI) |
| MMRG | Marine Mammal Research Group (Macquarie University; Australia) |
| MMRG | Maryland Mapping Resource Guide |
| MMRG | Mickleover Model Railway Group (UK) |