| Abbreviation | Definition |
|---|---|
| FECOF | Fédération Européenne des Communes Forestières (in French) European Federation of Forest Communes |
| FECS | Federation of European Cancer Societies |
| FECTO | Federation of European Cities Tourist Offices |
| FEDA | Federation for Economic Development Associations |
| FEDCO | Federation of Coops |
| FEDFA | Federation of European Deer Farmers Associations |
| FEF | Fédération Des Etudiants Francophones |
| FEF | Federation Elite Force |
| FEF | Fiji Employers Federation |
| FEFM | Fédération Européenne des Francs Maçons |
| FEI | Federation Equestre International |
| FEI | Federation Equestre Internationale |
| FEI | Federation of Equestrians International |
| FEKO | Federation of English Karate Organisations |
| FELA | Fédération Européenne des Loisirs Aériens (French: European Aerial Recreation Federation; EU) |
| FELABAN | Federación Latinoamericana de Bancos (Spanish: Latin American Federation of Banks) |
| FELS | Federation Early Learning Services |
| FEMP | Federal Energy Management Program |
| FEMP | Federation of European Mineral Programs |
| FEMS | Federation of European Microbiological Societies |