| Abbreviation | Definition |
|---|---|
| FKEP | Fussball Kreis Erlangen Pegnitzgrund (German soccer district) |
| FL2 | Football League Two, a division of the English Football League |
| FLSC | Freetown Lakeville Soccer Club |
| FLSL | Folsom Lake Soccer League |
| FOSC | Fair Oaks Soccer Club |
| FOSC | Fairfield Optimist Soccer Club |
| FPSA | Fairview Park Soccer Association |
| FRSA | Front Royal Soccer Association |
| FRSL | Free Reformed Soccer League |
| FSC | Foothills Soccer Club |
| FSQ | Federation de Soccer du Quebec |
| FSRA | Firelands Soccer Referee Association |
| FSSA | Florida State Soccer Association |
| FSSC | Flints Steelers Soccer Club |
| FSSL | Florida Suncoast Soccer League |
| FSSL | Fredericton Senior Soccer League |
| FTSC | Federal Triangles Soccer Club |
| FTSC | First Touch Soccer Camp |
| FTSC | Franklin Township Soccer Club |
| FTSC | Franklin Twp Soccer Club |