| Abbreviation | Definition |
|---|---|
| JCCF | Jefferson County Community Foundation |
| JCCF | Johnson County Community Foundation |
| JCCF | Jonsson Cancer Center Foundation |
| JCF | Joseph Campbell Foundation |
| JCF | Josephine County Foundation |
| JCFC | Jewish Community Foundation of Calgary |
| JCSF | Jean Charlotte Sarraf Foundation |
| JCWF | Jaycees of Wisconsin Foundation |
| JCWF | Johan Cruyff Welfare Foundation |
| JDCF | Jamaica Diaspora Canada Foundation |
| JDCF | Jamaican Diaspora Canada Foundation |
| JDCF | Jennifer Diamond Cancer Foundation |
| JDCF | Jo Daviess Conservation Foundation |
| JDMF | Jay Dooley Memorial Foundation |
| JDMF | John David Mooney Foundation |
| JDRF | Juvenile Diabetic Research Foundation |
| JDRF | Juvenille Diabetes Research Foundation |
| JFAC | Japan Foundation Asia Center |
| JFCR | Japanese Foundation for Cancer Research |
| JFF | Johnson Family Foundation |