| Abbreviation | Definition |
|---|---|
| NSSA | North Suburban Soccer Association |
| NSSCC | North Suburban Sports Car Club |
| NSSF | National Shooting Sports Foundation |
| NSSN | NAPMA School Support Network |
| NSTA | Norcross Sports Training Academy |
| NSTC | Nashua Swim and Tennis Club |
| NSTL | North Somerset Tennis League |
| NSW | Nike Sports Wear |
| NSW | North Shore Whingers |
| NSWA | North Sulawesi Watersports Association |
| NSWC | North Shore Winter Club |
| NSWIHA | New South Wales Ice Hockey Association |
| NSWIHF | New South Wales Ice Hockey Federation |
| NSWIS | New South Wales Institute of Sport |
| NSX | Next Sportscar Xperiment |
| NT | Nice Try |
| NT | No Time |
| NT | Nordic Tournament |
| NTA | National Tennis Academy |
| NTDR | Native Thunder Distance Runners |