| Abbreviation | Definition |
|---|---|
| JPA | Jam Packed Action |
| JPSC | Jeremy Phillips Sportscars Club |
| JR | Just Run |
| JSAF | Jordan Sports And Adventure Fellowship |
| JSK | Japan Shotokan Karate |
| JV | Just Visiting |
| JVA | Juneau Volleyball Association |
| JVA | Junior Varsity Athletics |
| JVBA | Junior Varsity BAseball |
| JVBB | Junior Varsity BasketBall |
| JVBG | Junior Varsity Boys' Golf |
| JVMA | Jacksonville Veterans Memorial Arena |
| JVTC | January Virtual Team Challenge |
| JW | Jackpot Winner |
| JWE | Jersey Wrestling Enterprise |
| JWN | Joe Willie Namath |
| JWO | Jack Wingate Open |
| JWOF | Jeep World Outside Festival |
| JYC | Jamestown Yacht Club |
| JYC | Jubilee Yacht Club |