| Abbreviation | Definition |
|---|---|
| NFL | Neighborhood Football League |
| NFL | The Northern Football League |
| NFLA | National Football League Alumni |
| NFLC | National Football League Committee |
| NFLE | National Football League Europe |
| NFLF | National Football League Foundation |
| NFLI | National Football League Indoor |
| NFLP | National Football League Properties |
| NFLPA | National Football League Players Association |
| NFNL | Nepean Football Netball League |
| NFPU | Namibia Football Players Union |
| NFT | national football team |
| NGFA | North Gwinnett Football Association |
| NHB | North Huntington Beach Football Club |
| NIFC | Northern Illinois Football Conference |
| NIFL | National Indoor Football League |
| NIFL | Northern Ireland Football League |
| NLAF | New Luton Attack Force |
| NMFC | North Melbourne Football Club |
| NMFF | Nauru Mini Football Federation |