| Abbreviation | Definition |
|---|---|
| MTFC | Matlock Town Football Club |
| MTFC | Merthyr Tydfil Football Club |
| MTFC | Mildenhall Town Football Club |
| MTFC | Morpeth Town Football Club |
| MTFL | Metro Touch Football League |
| MTFL | Middle Tennessee Football League |
| MTFL | Mississauga Touch Football League |
| MTJW | McHenry Township Jr Warriors |
| MUFC | Manchester United Football Club |
| MUFF | Manchester United Football Fan |
| MUFL | Mid Ulster Football league |
| MVFC | Missouri Valley Football Conference |
| MVFC | Moonee Valley Football Club |
| MWFL | Maritime Women's Football League |
| MWFL | Mid West Football League |
| NAFA | National Amateur Football Association |
| NAFA | Nauru Australian Football Association |
| NAFA | North Atlantic Football Agency |
| NAFC | North Adelaide Football Club |
| NAFC | North American Football Confederation |