| Code | Name | Region |
|---|---|---|
| USFII | Filer | ID |
| USFXT | Felton | CA |
| USF3T | Felton | DE |
| USFEX | Felton | PA |
| USPNM | Fennimore | WI |
| USFEJ | Fennville | MI |
| USIFN | Fenton | IA |
| USFNO | Fenton | MI |
| USFNM | Fenton | MO |
| USFTR | Fentress | VA |
| USV3W | Fenwick | WV |
| USFEF | Fenwick Island | DE |
| USFDA | Ferdinand | IN |
| USFFM | Fergus Falls | MN |
| USZGU | Ferguson | MO |
| USFN2 | Fernald | OH |
| USFEB | Fernandina Beach | FL |
| USQFE | Ferndale | CA |
| USFEE | Ferndale | MI |
| USQFN | Ferndale | NY |
| USFDT | Ferndale | WA |
| USFAY | Fayetteville | NC |
| USFY9 | Fayetteville | NY |
| USFV2 | Fayetteville | OH |
| USFYW | Fayetteville | PA |
| USFYM | Fayetteville | TN |
| USTXF | Fayetteville | TX |
| USYTT | Fayetteville | WV |
| USFQI | Fayville | MA |
| USJJW | Fe Warren Air Force Base | WY |
| USFEA | Feasterville | PA |
| USF37 | Feasterville-trevose | PA |
| USFH6 | Federal Heights | CO |
| USFDW | Federal Way | WA |
| USFDL | Federalsburg | MD |
| USFGH | Feeding Hills | MA |
| USFA2 | Felda | FL |
| USFYD | Felida | WA |
| USFW5 | Fellows | CA |
| USFEL | Fellsmere | FL |
| USFEK | Felt | OK |
| US8MF | Farnham | VA |
| USU7T | Farr West | UT |
| USFJR | Farragut | IA |
| USFAP | Farrell | PA |
| USFW8 | Farwell | MI |
| USFAW | Farwell | TX |
| USFXA | Fate | TX |
| USFAQ | Faulkner | MD |
| USFKO | Faulkton | SD |