| Code | Name | Region |
|---|---|---|
| USWT8 | Wilton | WI |
| USWM8 | Wilton Manors | FL |
| USWIU | Wimauma | FL |
| USWJB | Wimberley | TX |
| USW9B | Wimbledon | ND |
| USWLZ | Winamac | IN |
| USYXW | Winburne | PA |
| USWCD | Winchendon | MA |
| USIHR | Winchester | CA |
| USIHS | Winchester | IL |
| USWCS | Winchester | IN |
| USWIN | Winchester | KY |
| USIHT | Winchester | MA |
| USWCH | Winchester | NH |
| USWFZ | Winchester | OH |
| USWOM | Wilmington | MA |
| USILM | Wilmington | NC |
| USIZG | Wilmington | NY |
| USILN | Wilmington | OH |
| USIMG | Wilmington | VA |
| USWMT | Wilmington | VT |
| USW6M | Wilmore | KY |
| USZFS | Wilmot | NH |
| USWT7 | Wilmot | WI |
| USWIQ | Wilson | AR |
| USWZO | Wilson | MI |
| USWSO | Wilson | NC |
| US8LS | Wilson | NY |
| USWQI | Wilson | TX |
| USIOF | Wilson | WI |
| USW5L | Wilson | WY |
| USWV8 | Wilsonville | AL |
| USWL9 | Wilsonville | IL |
| USWJX | Wilsonville | OR |
| USUWO | Wilton | CA |
| USYIP | Willow Run Apt/detroit | MI |
| USIWS | Willow Spring | NC |
| USWZG | Willow Springs | IL |
| USZWO | Willow Springs | MO |
| US5WS | Willow Street | PA |
| USWIW | Willow Wood | OH |
| USWVW | Willowbrook | CA |
| USWOP | Willowbrook, Dupage | IL |
| USWLW | Willows | CA |
| USWPB | Wills Point | NJ |
| USILS | Wills Point | TX |
| USWSI | Willsboro | NY |
| USVAW | Willston | VA |
| USWMA | Wilma | WA |
| USWXR | Wilmer | TX |