| Abbreviation | Definition |
|---|---|
| ACFL | All-County Football League |
| ACFL | Atlantic Coast Football League |
| ACYF | American Canyon Youth Football |
| ADFL | Abu Dhabi Football League |
| ADFL | American Developmental Football League |
| AF2 | ArenaFootball 2 |
| AFAS | Alley Football All Stars |
| AFBC | Association Of Football Badge Collectors |
| AFBD | American Football Bund Deutschland |
| AFBN | American Football Bond Nederland |
| AFC | Adelaide Football Corporation |
| AFC | Amateur Football Club |
| AFC | Asian Football Confederation |
| AFC | Association Football Club |
| AFC | Atlantic Football Conference |
| AFCA | American Football Coaches Association |
| AFCA | American Football Coaches Association& |
| AFCA | American Football Coaches Association… |
| AFCN | Auckland Football Coaches Network |
| AFF | American Football in Finland |