| Abbreviation | Definition |
|---|---|
| NFY | Norfolk Future Youth |
| NFYC | Nebraska Foster Youth Council |
| NFYT | National Festival of Youth Theatre |
| NFYT | National Festival of Youth Theatres |
| NGY | Next Generation Youth |
| NHYM | New Hampshire Youth Movement |
| NHYRBS | New Hampshire Youth Risk Behavior Survey |
| NICHY | National Information Center For Handicapped Youth |
| NIYA | National Immigrant Youth Alliance |
| NIYC | National Indian Youth Council |
| NIYO | National International Youth Organization |
| NJ | Navy Junior |
| NJY | New Jersey Youth |
| NKYL | North Kingstown Youth Lacrosse |
| NLSY | National Longitudinal Survey of Youth (USA) |
| NNY | New Nigeria Youth |
| NOSY | Network Of Seattle Youth |
| NOYA | New Orleans Youth Alliance |
| NOYS | National Organization of Youth Safety |
| NOYS | National Organizations for Youth Safety |