| Code | Name | Region |
|---|---|---|
| USUWA | Ware | MA |
| USASS | Ware Shoals | SC |
| USRBW | Walterboro | SC |
| USRRR | Walters | OK |
| US2WL | Walterville | OR |
| USWLM | Waltham | MA |
| USWXA | Walthourville | GA |
| USWL6 | Walton | IN |
| USWKU | Walton | KS |
| USQWT | Walton | KY |
| USW7L | Walton | NE |
| USJWO | Walton | NY |
| USWJP | Walton Hills | OH |
| USWAW | Walworth | WI |
| USWAO | Wamego | KS |
| USWP3 | Wampsville | NY |
| USWMM | Wampum | PA |
| USWU3 | Wamsutter | WY |
| USWAN | Wanamingo | MN |
| USIWQ | Wanaque | NJ |
| 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 |