| Code | Name | Region |
|---|---|---|
| USWF8 | Waterford | VT |
| USTEY | Waterford | WI |
| USWFJ | Waterford Works | NJ |
| USVTL | Waterloo | AL |
| USALO | Waterloo | IA |
| USZTE | Waterloo | IL |
| USZZE | Waterloo | IN |
| USXWA | Waterloo | NE |
| USWOO | Waterloo | NY |
| USW2O | Waterloo | OH |
| USZWA | Waterloo | WI |
| USWPV | Waterloo, Johnson | IN |
| USWTA | Waterman | IL |
| USWGK | Washington Park | IL |
| USW9A | Washington Terrace | UT |
| USY7T | Washington Township | NJ |
| USGIP | Washington Township | NJ |
| USWSL | Washingtonville | NY |
| USWG8 | Washingtonville | PA |
| USWXG | Washougal | WA |
| USWWA | Wasilla | AK |
| USZJN | Waskom | TX |
| USWA5 | Wassaic | NY |
| US4AG | Wataga | IL |
| USWA6 | Watchung | NJ |
| USAEM | Water Mill | NY |
| USWVA | Water Valley | MS |
| USWB9 | Waterboro | ME |
| USWAT | Waterbury | CT |
| USWBV | Waterbury | VT |
| USKWF | Waterfall | AK |
| USTFW | Waterflow | NM |
| USWGI | Washington | IL |
| USWSQ | Washington | IN |
| USWS9 | Washington | KS |
| USHQJ | Washington | LA |
| USLXZ | Washington | LA |
| US8NG | Washington | ME |
| USNGN | Washington | MI |
| USWSK | Washington | MO |
| USOCW | Washington | NC |
| US8WS | Washington | NH |
| USWQY | Washington | NJ |
| USWSG | Washington | PA |
| USWGT | Washington | UT |
| USW88 | Washington | VA |
| USH6T | Washington | VT |
| USWWV | Washington | WV |
| USWC9 | Washington County | ME |
| USWCQ | Washington Court House | OH |