| Code | Name | Region |
|---|---|---|
| USWO8 | Worton | MD |
| USWRG | Wrangell | AK |
| USW5R | Wray | CO |
| USWRJ | Wray | GA |
| USWN2 | Wren | MS |
| USWOE | Woodville | MS |
| USWV4 | Woodville | OH |
| USWV7 | Woodville | TX |
| USWJV | Woodville | WI |
| USUWW | Woodward | IA |
| USWWR | Woodward | OK |
| USDWY | Woodway | TX |
| USWUF | Woodway | WA |
| USW2W | Woodworth | LA |
| USYWR | Woolrich | PA |
| US8WW | Woolwich | ME |
| USW4W | Woolwich Township | NJ |
| USSFN | Woonsocket | RI |
| USOSK | Woonsocket | SD |
| USOEF | Woorburn | KY |
| USBJJ | Wooster | OH |
| USW3C | Worcestar | MA |
| USORH | Worcester | MA |
| USWOC | Worcester | NY |
| USKOW | Worcester | PA |
| USDBK | Woodsboro | TX |
| USW5F | Woodsfield | OH |
| USWDZ | Woodside | CA |
| USWD5 | Woodside | DE |
| USWOS | Woodside/queens/new York | NY |
| USVTR | Woodson Terrace/st Louis | MO |
| USWOK | Woodstock | AL |
| USWDS | Woodstock | CT |
| USWOY | Woodstock | GA |
| USWOZ | Woodstock | IL |
| USWQK | Woodstock | IN |
| USWDK | Woodstock | MD |
| USZW3 | Woodstock | NH |
| USWO3 | Woodstock | NY |
| USWUD | Woodstock | TN |
| USWD6 | Woodstock | VA |
| USWK6 | Woodstock | VT |
| US5WD | Woodstock Valley | CT |
| USWDO | Woodstown | NJ |
| USWOV | Woodsville | NH |
| USOPR | Woodland Park | CO |
| USDP8 | Woodland Park | NJ |
| USWDI | Woodlawn | IL |
| USW2N | Woodlawn | MD |
| USWON | Woodlawn | OH |