| Abbreviation | Definition |
|---|---|
| MFFD | Menomonee Falls Fire Department |
| MFFD | Millers Ferry Fire Department |
| MFFD | Mulberry-Fairplains Fire Department |
| MHFD | Maryland Heights Fire District |
| MHFD | Middletown Hardenburgh Fire District |
| MHFD | Mountain Home Fire Department |
| MLFD | Mammoth Lakes FIre Department |
| MLFD | Mammoth Lakes Fire District |
| MLFD | Manhasset Lakeville Fire Department |
| MLFD | Medford Lakes Fire Department |
| MLFD | Moses Lake Fire Department |
| MLFD | Mount Laurel Fire Department |
| MLFD | Mount Laurel Fire Dept |
| MNFD | Metro Nashville Fire Department |
| MOFD | Moraga Orinda Fire District |
| MR | Medical Rescue |
| MRFD | Manawa Rural Fire Department |
| MRFD | Minot Rural Fire Department |
| MRFD | Missoula Rural Fire District |
| MRFD | Monroe Rural Fire District |