| Abbreviation | Definition |
|---|---|
| MTFA | Middletown Township Fire Academy |
| MTFI | Montana Tactical Firearms Instruction |
| MTFR | Miami Township Fire Rescue |
| MTI | Mechanical Trades Inspector |
| MTM | Multi-Task Management |
| MTO | Ministry of Transportation, Ontario |
| MTPIN | Montana Performance Improvement Network |
| MTPO | Metropolitan Transportation Planning Organization |
| MTPP | Metropolitan Toronto Pension Plan |
| MTPP | Metropolitan Transit Promotion Program |
| MTPP | Michigan Township Participating Plan |
| MTS | Montgomery Transitional Services |
| MTTF | Mass Transportation Trust Fund |
| MUB | Morgantown Utility Board |
| MUD | Municipal Utility District |
| MUFC | Minnesota Uniform Fire Code |
| MUGC | Mixed Use General Commercial (zoning) |
| MUM | Caledonia - Mumford |
| MUN | Municipal |
| MUNI | Municipal |