| Code | Name | Region |
|---|---|---|
| USWPT | Westport | CA |
| USWPR | Westport | CT |
| USWP5 | Westport | IN |
| USWQL | Westlake | LA |
| USWLX | Westlake | OH |
| USWK2 | Westlake | TX |
| USWQV | Westlake Village | CA |
| USWTD | Westland | MI |
| USQWY | Westley | CA |
| USWMZ | Westminster | CA |
| USWME | Westminster | CO |
| USWMI | Westminster | MA |
| USWMD | Westminster | MD |
| USWMR | Westminster | SC |
| USRWM | Westminster | TX |
| USWCM | Westminster | VT |
| USWJO | Westmont | IL |
| USK5W | Westmoreland | KS |
| USW3M | Westmoreland | NH |
| USTRQ | Westmoreland | NY |
| USWML | Westmoreland | PA |
| USW2M | Westmoreland | TN |
| USWY9 | Westmoreland City | PA |
| USWST | Westerly | RI |
| USVGN | Western Grove | AR |
| US3WS | Western Springs | IL |
| USWPZ | Westernport | MD |
| USWN8 | Westernville | NY |
| USWTY | Westerville | OH |
| USWFI | Westfield | IN |
| USBAF | Westfield | MA |
| US9FI | Westfield | ME |
| USWFL | Westfield | NC |
| USWFU | Westfield | NJ |
| USWXY | Westfield | NY |
| USW7E | Westfield | VT |
| USWF2 | Westfield | WI |
| USWFR | Westford | MA |
| USFHW | Westford | VT |
| USQWH | Westhampton | NJ |
| USFOK | Westhampton | NY |
| USUWB | Westhampton Beach | NY |
| USWHP | Westhope | ND |
| USESI | West Windsor | VT |
| USEFU | West Winfield | NJ |
| USTDZ | West Winfield | NY |
| USWMU | West Yarmouth | MA |
| USWYS | West Yellowstone | MT |
| USWYK | West York | PA |
| USWEP | Westampton | NJ |