| Abbreviation | Definition |
|---|---|
| FOHC | Friends of Hoddles Creek |
| FOHC | Friends Of Honduran Children |
| FOLUSA | Friends of Libraries, United States of America |
| FOMV | Friends of Moraine View State Recreation Area |
| FON | Federation of Ontario Naturalists, renamed Ontario Nature (ON) |
| FONDESCH | Foundation Development Education & Community Services Haiti |
| FONR | Friends Of the Napa River |
| FONZ | Friends Of the National Zoo |
| FOOD | Food Of The Orange District |
| FOPA | Friends of the Performing Arts |
| FOPC | Friends Of Peralta Creek |
| FOPC | Friends Of Portencross Castle |
| FOPDAC | Federation of Overseas Property Developers, Agents, and Consultants |
| FOR | Friends Of the Rouge |
| FORD | Forum for the Restoration of Democracy |
| FORE | Foundation for Organisational Research and Education |
| FORM | Foundation for Organic Resources Management, Inc. |
| FOS | Financial Ombudsman Service |
| FoSF | Friends of Sherwood Forest |
| FOSI | Friends Of Stradbroke Island |