| Abbreviation | Definition |
|---|---|
| NISA | National Independent Soccer Association |
| NISL | National Indoor Soccer League |
| NISL | Northern Illinois Soccer League |
| NJS | New Jersey Stars Soccer Team |
| NJSA | New Jersey Soccer Association |
| NJSA | Norwalk Junior Soccer Association |
| NJSL | Northwest/Jackson Soccer League |
| NMSA | Northern Michigan Soccer Alliance |
| NMSC | North Mississauga Soccer Club |
| NMSL | National Masters Soccer League |
| NMSL | Nebraska Men Soccer League |
| NMSL | Northern Maryland Soccer League |
| NNSSC | Niagara Northern Stars Soccer Club |
| NOSO | North Olmsted Soccer Organization |
| NPSC | Newbury Park Soccer Club |
| NPSL | National Premier Soccer League |
| NPSL | National Professional Soccer League |
| NRSA | North Rockland Soccer Association |
| NSL | National Soccer League |
| NSL | Nebraska Soccer League |