| Abbreviation | Definition |
|---|---|
| RFF | Religious Freedom Fund |
| RFF | Rockefeller Family Fund |
| RFH | Reasons For Hope |
| RFH | Rome Floyd County Humane Society |
| RFH | Rotary First Harvest |
| RFKM | Robert F. Kennedy Memorial |
| RFN | Reproductive Freedom Network |
| RFW | Responsibility and Freedom Work |
| RGHF | Rotary Global History Fellowship |
| RGK | Ronya and George Kozmetsky Foundation |
| RGMC | Reform Gravel Mining Coalition |
| RGS | Royal Geographical Society |
| RGS | Ruffed Grouse Society |
| RHA | Rental Housing Association |
| RHA | Reproductive Health in Asia |
| RHA | Robin Hood's Army |
| RHBA | Richmond Hill Block Association |
| RHEA | Richmond Heights Education Association |
| RHEA | Richmond Hill Elderly Action |
| RHF | Renewable Hydrogen Forum |