| Code | Name | Region |
|---|---|---|
| USFDV | Forked River | NJ |
| USFTI | Forest | MS |
| USFS4 | Forest | VA |
| USFXY | Forest City | IA |
| USFCC | Forest City | IL |
| USF5Y | Forest City | MO |
| USFCN | Forest City | NC |
| USFZC | Forest City | PA |
| USFSQ | Forest Dale | VT |
| USFGV | Forest Grove | OR |
| USFH9 | Forest Hill | LA |
| USFES | Forest Hill | MD |
| USFH8 | Forest Hill | TX |
| US9FH | Forest Hill | WV |
| USF4H | Forest Hills | TN |
| USFHL | Forest Hills/queens/new York | NY |
| USFJ3 | Forest Junction | WI |
| USF5K | Forest Knolls | CA |
| USFSL | Forest Lake | MN |
| USFTA | Forest Park | AR |
| USFOP | Forest Park | GA |
| USFOJ | Folsom | LA |
| USFM3 | Folsom | NJ |
| USOMY | Fombell | PA |
| USFLD | Fond Du Lac | WI |
| USFOY | Fonda | NY |
| USXFR | Fontana | CA |
| USFJO | Fontana | WI |
| USFT2 | Fontanet | IN |
| USFHH | Foothill Farms | CA |
| USFOH | Foothill Ranch | CA |
| USFBQ | Forbing | LA |
| USF2D | Ford | WA |
| USFCT | Ford City | PA |
| USFHG | Ford Heights | IL |
| USFD3 | Fordland | MO |
| USAEB | Fords | NJ |
| USFSV | Fordsville | KY |
| USVDF | Fordville | ND |
| USFDC | Fordyce | AR |
| USFM8 | Foreman | AR |
| USFOQ | Flourtown | PA |
| USXFG | Flower Mound | TX |
| USFLB | Flowery Branch | GA |
| USFWD | Flowood | MS |
| USVAF | Floyd | VA |
| USFDD | Floydada | TX |
| USFNI | Floyds Knobs | IN |
| USFUH | Flushing | MI |
| USFLU | Flushing Apt/new York | NY |