NJA
| Acronym | Definition |
|---|---|
| NJA | National Judicial Academy (Bhopal, India) |
| NJA | Non-Japan Asia (usually in terms of an economic or trading bloc) |
| NJA | NetJets Aviation, Inc. |
| NJA | National Jerkin' Association |
| NJA | National Judges Association |
| NJA | National Jousting Association |
| NJA | Nauka Jezyka Angielskiego (Polish: English Language Teaching) |