| Code | Name | Region |
|---|---|---|
| USFHV | Fishersville | VA |
| USFSW | Fishertown | PA |
| USFIK | Fishkill | NY |
| USFKD | Fiskdale | MA |
| USKFI | Fiskeville | RI |
| USFIT | Fitchburg | MA |
| USFIB | Fitchburg | WI |
| USFCH | Fitchville | CT |
| USIHN | Fithian | IL |
| USFZG | Fitzgerald | GA |
| USFZK | Fitzpatrick | AL |
| USFTY | Filer City | MI |
| USFIM | Fillmore | CA |
| USFMO | Fillmore | NY |
| USFIL | Fillmore | UT |
| USFJC | Fincastle | VA |
| USXFL | Finderne | NJ |
| USFY8 | Findlay | IL |
| USFDY | Findlay | OH |
| US47L | Findley Lake | NY |
| USFNK | Fink Creek | AK |
| USFNS | Finksburg | MD |
| US9FD | Finland | MN |
| USFEY | Finley | ND |
| USFYI | Finleyville | PA |
| USFZT | Fircrest | WA |
| USFIC | Fire Cove | AK |
| USFIR | Firebaugh | CA |
| US9FB | Firebrick | KY |
| USRTC | Firestone | CO |
| USFHQ | Firth | ID |
| USFYR | Fernley | NV |
| USFWE | Fernwood | ID |
| USFIQ | Fernwood | MS |
| USQFI | Ferriday | LA |
| USFEI | Ferris | TX |
| USFBH | Ferrisburgh | VT |
| USFER | Ferrysburg | MI |
| USXZ7 | Ferryville | WI |
| USFNU | Fessenden | ND |
| USFUS | Festus | MO |
| USXFJ | Feura Bush | NY |
| USFI3 | Fiddletown | CA |
| USFIE | Fieldale | VA |
| USFS5 | Fields | OR |
| USF5L | Fields Landing | CA |
| USFDJ | Fieldsboro | NJ |
| USFFS | Fife | WA |
| USFF4 | Fife Lake | MI |
| USFYL | Fifty Lakes | MN |