| Abbreviation | Definition |
|---|---|
| JRC | Jewish Recreational Club |
| JRCCS | Judo Royal Crossing Club Schaerbeek |
| JRDC | Jamaica Race Drivers Club |
| JRLC | Junior Rugby League Club |
| JRSC | Jolly Roger Sailing Club |
| JSCB | Jamet Sporting Club Bellevue |
| JSRC | Jam Sil Running Club |
| JSRC | Jersey Shore Running Club |
| JSSC | Jersey Spurs Supporters Club |
| JTCF | Jagd Terrier Club de France |
| JTDC | Jupiter Tequesta Dog Club |
| JTSC | Jenks Trojan Swim Club |
| JTTC | Joplin Table Tennis Club |
| JUSC | Johnston Urbandale Soccer Club |
| JVBC | Jurupa Valley Boxing Club |
| JVTC | Jogja Vintage Trail Club |
| JWC | Junior Woman's Club |
| JWFC | Joondalup Womens Football Club |
| JYC | Jackson Yacht Club |
| JYC | Jefferson Yacht Club |