| Code | Name | Region |
|---|---|---|
| USWYH | Wylie | TX |
| USYN4 | Wynantskill | NY |
| USBQ9 | Wyncote | PA |
| USWYQ | Wynne | AR |
| USW9W | Wynnewood | OK |
| USQWW | Wynnewood | PA |
| USWVX | Wyoming | DE |
| USYOJ | Wyoming | IL |
| USWYM | Wyoming | MI |
| USYZM | Wyoming | MN |
| USYOM | Wyoming | NY |
| USWYP | Wyoming | PA |
| USYMG | Wyoming | RI |
| USWYW | Wyoming | WI |
| USWGP | Wyomissing | PA |
| USUZM | Wrens | GA |
| USWLL | Wrenshall | MN |
| USWX2 | Wrentham | MA |
| USIGF | Wright | KS |
| USWGJ | Wright | WY |
| USWCU | Wright City | MO |
| USW9U | Wright City | TX |
| USRW5 | Wright-patterson | OH |
| USWGZ | Wrightstown | NJ |
| USWXS | Wrightstown | WI |
| USWVF | Wrightsville | GA |
| USXOG | Wrightsville | PA |
| USWGC | Wrightsville Beach | NC |
| USWNW | Wrightwood | CA |
| USWUR | Wurtland | KY |
| USTWO | Wurtsboro | NY |
| USWYC | Wyalusing | PA |
| USXWY | Wyandanch | NY |
| USWYD | Wyandotte | MI |
| USYAE | Wyanet | IL |
| USW7C | Worcester | VT |
| USWI2 | Worden | IL |
| USWRL | Worland | WY |
| US6OC | Woronoco | MA |
| USWRH | Worth | IL |
| USWRX | Wortham | TX |
| USW8D | Worthing | SD |
| USJTI | Worthington | IN |
| USW4T | Worthington | KY |
| USOTG | Worthington | MN |
| USWGH | Worthington | OH |
| USVWH | Worthington | PA |
| USZWG | Worthington | WV |
| USOHT | Worthington Center | MA |
| USWG4 | Worthington Springs | FL |