| Code | Name | Region |
|---|---|---|
| USWLT | Wallington | NJ |
| USWLV | Wallisville | TX |
| USWAK | Wallkill | NY |
| USWLS | Walls | MS |
| USWUW | Wallula | WA |
| USWLU | Walnut | CA |
| USWU7 | Walnut | IA |
| USW5A | Walnut | KS |
| US5WL | Wallace | MI |
| USWLE | Wallace | NC |
| USWBT | Wallace | SC |
| US9GS | Wallagrass | ME |
| USQWK | Walker | MN |
| USW2V | Walker | WV |
| USWK3 | Walker, Jackson | LA |
| USWK4 | Walker, Livingston | LA |
| USXNX | Walkersville | MD |
| USWKC | Walkerton | IN |
| USWKN | Walkerton | VA |
| USAKW | Walkertown | NC |
| USWUA | Walkertown | PA |
| USVLX | Walkerville | MI |
| USWLJ | Wall | NJ |
| USAWP | Wall | PA |
| USWZL | Wall | SD |
| USJQW | Wall | TX |
| USWKP | Wall Lake | IA |
| USYNP | Wall Township | NJ |
| USALW | Walla Walla | WA |
| USWA2 | Wallace | CA |
| USAW6 | Wallace | ID |
| USAWC | Wallace | ID |
| US8UY | Waldo | OH |
| USWGA | Waldo | WI |
| USWDJ | Waldoboro | ME |
| USWFM | Waldorf | MD |
| USWN6 | Waldron | AR |
| USWDM | Waldron | MI |
| USWDN | Waldron Island | WA |
| USWWK | Waldwick | NJ |
| USWAA | Wales | AK |
| US5SW | Wales | MA |
| USQLS | Wales | MI |
| USW2A | Wales | NY |
| USW3A | Wales | WI |
| US2WC | Wales Center | NY |
| USWFQ | Walford | IA |
| USVLH | Walhalla | ND |
| USWHJ | Walhalla | SC |
| USW7A | Walhonding | OH |