| Code | Name | Region |
|---|---|---|
| US6NJ | Winslow | NJ |
| USWNS | Winsted | CT |
| USWJN | Winsted | MN |
| USVSN | Winston | GA |
| US8AN | Winston | MT |
| USNFV | Winfield | IL |
| USWLD | Winfield | KS |
| USWFV | Winfield | PA |
| USWXF | Winfield | TN |
| USINF | Winfield | TX |
| USWF9 | Winfield | WV |
| USXWG | Wingate | NC |
| USWGX | Wingate | TX |
| USIGP | Wingdale | NY |
| USWJ2 | Winger | MN |
| USINK | Wink | TX |
| USWQW | Winlock | WA |
| US3NN | Winn | ME |
| USWQM | Winn | MI |
| USWNN | Winnebago | IL |
| USNGX | Winnebago | NE |
| USWGB | Winnebago, Faribault | MN |
| USYEC | Winneconne | WI |
| USWMC | Winnemucca | NV |
| USXWZ | Winner | SD |
| USDZS | Windsor | IL |
| US5WO | Windsor | MA |
| USQZJ | Windsor | ME |
| US6MO | Windsor | MO |
| USWNJ | Windsor | NJ |
| USXNS | Windsor | NY |
| USOW6 | Windsor | SC |
| USXWN | Windsor | VA |
| USWIV | Windsor | VT |
| USXOC | Windsor | WI |
| USW5H | Windsor Heights | IA |
| USZRI | Windsor Heights | WV |
| USWLC | Windsor Locks | CT |
| USBDL | Windsor Locks-hartford Apt | CT |
| USWM9 | Windsor Mill | MD |
| USINB | Windsor, Bertie | NC |
| USIW3 | Windthorst | TX |
| US2HO | Winesburg | OH |
| USIAU | Winfall | NC |
| USWIF | Winfield | AL |
| USWCV | Winchester | TN |
| USWGO | Winchester | VA |
| USYST | Winchester | WA |
| USWCC | Winchester Center | CT |
| USWNG | Wind Gap | PA |