| Abbreviation | Definition |
|---|---|
| JAAA | Jamaica Amateur Athletic Association |
| JAAA | Jamaica Amateur Athletic Association's |
| JAAA | Jamaica Athletics Administrative Association |
| JAAF | Japan Association of Athletics Federations |
| JACC | Joyce Athletics & Convention Center |
| JAF | Jaguar Athletic Fund |
| JBAA | James Bay Athletic Association |
| JBAC | Jacuzzi Boys Athletic Club |
| JBAC | Junius Boling Athletic Club |
| JMAC | Joint Military Athletic Competition |
| JSAG | Jersey Shore Athletic Group |
| JTAA | Jupiter Tequesta Athletic Association |
| JVA | Junior Varsity Athletics |
| JWAA | James Wood Athletics Association |
| KAA | Kirkwood Athletic Association |
| KAAA | Kenya Amateur Athletic Association |
| KAAF | Kalamazoo Amateur Athletic Federation |
| KAC | Kenitra Athletic Club |
| KAC | Kingwood Athletic Club |
| KAOS | Kinetic Athletic Olympic System |