| Abbreviation | Definition |
|---|---|
| NIYLP | National Indian Youth Leadership Project |
| NJ | National Jewish Medical and Research Center |
| NJAD | New Jersey Association of the Deaf |
| NJARA | New Jersey Animal Rights Alliance |
| NJBA | New Jersey Blacksmiths Association |
| NJMRC | National Jewish Medical and Research Center |
| NJNWTF | New Jersey State Chapter of the National Wild Turkey Federation |
| NJSF | Naval Justice School Foundation |
| NJT | Not Just Tourists |
| NKCA | National Kidney Cancer Association |
| NKCS | Northwest Korean Culture Society |
| NKDA | North Kent Dyslexia Association |
| NKEA | Northern Kentucky Electrical Association |
| NKF | National Kidney Foundatiomn |
| NKF | National Kidney Foundation |
| NKF | Nobodys' Kids Foundation |
| NKFM | National Kidney Foundation of Michigan |
| NKFNCA | National Kidney Foundation of the National Capital Area |
| NKF-O | National Kidney Foundation of Ohio |
| NKW | Nonprofit Knowledge Works |