| Abbreviation | Definition |
|---|---|
| NAFL | North American Football League |
| NAFL | Northern Amateur Football League |
| NAFU | North American Football Union |
| NBFC | North Beach Football Club |
| NBFFL | New Brunswick Flag Football |
| NBFFL | New Brunswick Flag Football League |
| NBFL | North Berks Football League |
| NCAAF | National Collegiate Athletic Association Football |
| NCAAF | NCAA Football |
| NCFA | National Club Football Association |
| NCFC | North Carolina Football Club |
| NCFC | Norwich City Football Club |
| NCFD | National College Football Day |
| NCFF | Nooch's College Fantasy Football |
| NCFL | National Card Football League |
| NCFL | No Cowdogs Football League |
| NCFL | North Central Football League |
| NCFL | North County Football League |
| NCFL | Northern Connecticut Football League |
| NCFOA | Northern California Football Officials Association |