| Code | Name | Region |
|---|---|---|
| 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 |
| USVWE | Walker | CA |
| USLKR | Walker | MI |
| USIBG | Waitsburg | WA |
| USWAI | Waitsfield | VT |
| USWK9 | Wakarusa | IN |
| USWK5 | Wake | VA |
| USWKR | Wake Forest | NC |
| USWKQ | Wakeeney | KS |
| USWKF | Wakefield | MA |
| USWFE | Wakefield | MI |
| USWJK | Wakefield | NE |
| USAKF | Wakefield | RI |
| USWKD | Wakefield | VA |
| USWA7 | Wakeman | OH |
| USWBG | Walbridge | OH |
| USVXS | Walburg | TX |
| USOJT | Walcott | IA |
| USWA3 | Walden | CO |
| USWDA | Walden | NY |
| USWD9 | Waldenburg | AR |