JJA
| Acronym | Definition |
|---|---|
| JJA | June July August |
| JJA | Jazz Journalists Association |
| JJA | Japanese Journal of Allergology |
| JJA | Juvenile Justice Authority (Kansas) |
| JJA | Japan Juku Association (education) |
| JJA | just joking around |
| JJA | Japan Jewellery Association (Tokyo, Japan) |
| JJA | Josephson Junction Array |
| JJA | Johnson and Johnston Associates |