| Abbreviation | Definition |
|---|---|
| NAPL | North American Premier League |
| NAPMA | National Association of Professional Martial Artists |
| NARF | Native American Redskins Fans |
| NARI | North American Racewalking Institute |
| NARN | Native American Redskins Nation |
| NARRA | North American Road Racing Association |
| NASA | Natural Athlete Strength Association |
| NASA | Nautical Acrobatic Stunts Association |
| NASA | Northmemorial Amateur Sports Association |
| NASC | National Alpine Ski Camp |
| NASCAR | Non Athletic Sports Cars And Rednecks |
| NASCAR | Not A Sport Circles Are Round |
| NASD | National Association for Sports Development |
| NASDC | North Atlantic Swing Dance Championship |
| NASI | North American Series I |
| NASL | North American Soccer League |
| NASM | National Academy of Sports Medicine |
| NASN | North American Sports Network |
| NASO | National Association of Sports Officials |
| NASPE | National Association For Sport And Physical Education |