MTSG
| Acronym | Definition |
|---|---|
| MTSG | Marine Turtle Specialist Group (International Union for the Conservation of Nature and Natural Resources) |
| MTSG | Mountains to Sound Greenway (Seattle, WA) |
| MTSG | Manchester Trainee Solicitors Group (UK) |
| MTSG | Muay Thai Singapore (website) |
| MTSG | Mayo Traveller Support Group (Ireland) |
| MTSG | Medium Term Strategy Group (Ministry of Economic Development; New Zealand) |