NJI
| Acronym | Definition |
|---|---|
| NJI | National Judicial Institute (Ottawa, Ontario, Canada) |
| NJI | Nederlands Jeugd Instituut (Dutch: Netherlands Youth Institute) |
| NJI | New Jubilee Insurance Company Limited (Karachi, Pakistan) |
| NJI | National Jewelry Institute (Pittsburgh, PA) |
| NJI | Neighborhood Jobs Initiative |
| NJI | New Jersey Institute for Training in Psychoanalysis |