| Code | Name | Region |
|---|---|---|
| USWFX | Waverly | MD |
| USWY8 | Waverly | MN |
| USWVH | Waverly | MO |
| USUWK | Watkins | CO |
| USWKI | Watkins | MN |
| USWKG | Watkins Glen | NY |
| USVKV | Watkinsville | GA |
| USYWQ | Watonga | OK |
| USXOD | Watseka | IL |
| USWTC | Watson | CA |
| USS4O | Watson | MN |
| USASW | Watsontown | PA |
| USWVI | Watsonville | CA |
| USWJZ | Watts | CA |
| USWU9 | Wauchula | FL |
| USWQN | Wauconda | IL |
| USWKE | Waukee | IA |
| USUGN | Waukegan | IL |
| USUES | Waukesha | WI |
| USUKN | Waukon | IA |
| USW5D | Waumandee | WI |
| USWAU | Wauna | OR |
| USYWN | Wauna | WA |
| USWP6 | Waterport | NY |
| USWPF | Waterproof | LA |
| USWTT | Watertown | CT |
| USWTW | Watertown | MA |
| USART | Watertown | NY |
| USATY | Watertown | SD |
| USWWZ | Watertown | TN |
| USWAF | Watertown | WI |
| USVWL | Waterville | KS |
| USWVS | Waterville | MA |
| USWVL | Waterville | ME |
| USW23 | Waterville | NY |
| USTEI | Waterville | OH |
| US999 | Waterville | PA |
| USTIL | Waterville | WA |
| USWZY | Waterville Valley | NH |
| USWTV | Watervliet | MI |
| USXOE | Watervliet | NY |
| USWF3 | Watford City | ND |
| USWJA | Wathena | KS |
| USWVD | Waterford | CA |
| USTQF | Waterford | CT |
| USWTM | Waterford | ME |
| USWTF | Waterford | MI |
| USUZK | Waterford | NY |
| USXWF | Waterford | OH |
| USWXX | Waterford | PA |