| Code | Name | Region |
|---|---|---|
| USZUB | Wanatah | IN |
| USQWA | Wanchese | NC |
| USXKS | Walnut Cove | NC |
| USWAC | Walnut Creek | CA |
| USWUC | Walnut Creek | OH |
| USYXG | Walnut Grove | CA |
| USWGR | Walnut Grove | MO |
| USWAG | Walnut Grove | MS |
| USW32 | Walnut Hill | FL |
| USVTH | Walnut Hill | IL |
| USXQX | Walnut Hills | OH |
| USARG | Walnut Ridge | AR |
| USH9S | Walnut Shade | MO |
| USWG3 | Walnut Springs | TX |
| USWNU | Walnutport | PA |
| USWPL | Walpole | MA |
| USAW9 | Walpole | ME |
| USWLP | Walpole | NH |
| USWA4 | Walsh | CO |
| USWQC | Walsh Station | CA |
| USW4A | Walston | PA |
| USIC9 | Walstonburg | NC |
| US6NT | Walland | TN |
| USWB7 | Wallburg | NC |
| USWBL | Walled Lake | MI |
| USVLL | Waller | TX |
| USWFD | Wallingford | CT |
| USYGF | Wallingford | KY |
| USWF5 | Wallingford | PA |
| USWGF | Wallingford | VT |
| 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 |