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| Fairbury | Fieldon | Fort Sheridan |
| Fairfield | Fillmore | Fowler |
| Fairmount | Findlay | Fox Lake |
| Fairview | Fisher | Fox River Grove |
| Fairview Heights | Fithian | Fox Valley |
| Fancy Praire | Flanagan | Frankfort |
| Farina | Flat Rock | Frankfort Heights |
| Farmer City | Flora | Franklin |
| Farmersville | Flossmoor | Franklin Grove |
| Farmerdale | Foosland | Franklin Park |
| Farmington | Ford Heights | Frederick |
| Fayettville | Forest City | Freeburg |
| Fenton | Forest Park | Freeman Spur |
| Ferris | Forrest | Freeport |
| Fiatt | Forreston | Fulton |
| Fidelity | Forsyth | Fults |