| Abbreviation | Definition |
|---|---|
| JGLC | Jolly Good, Lets Celebrate! |
| JGT | Jazz Goes to Town |
| JHCB | Jackson Hole Community Band |
| JHG | Jews Harp Guild |
| JHJ | Johnny Hates Jazz |
| JIJ | Join In Jamboree |
| JITN | Jazz in the Neighborhood |
| JJ | Jazz Jackrabbit |
| JJ | Junaid Jamshed |
| JJA | Jazz Journalists Association |
| JJB | Jeff Jolly Band |
| JJB | Juggernaut Jug Band |
| JJBA | Japan Jazz Blues Association |
| JJG | Josh Joplin Group |
| JJJ | Jay-Jay Johnson |
| JJR | Jesse James Russell Band |
| JKN | Johnny Killed Nashville |
| JKO | Justin Kalk Orchestra |
| JL | Just Loud |
| JLCO | Jazz at Lincoln Center Orchestra |