| Code | Name | Region |
|---|---|---|
| USWDY | Woodbury | MN |
| USWOJ | Woodbury | NJ |
| US8TT | Woodbury | NY |
| USQDB | Woodbury | TN |
| US7WY | Woodbury | VT |
| USWIX | Wixom | MI |
| USWBN | Woburn | MA |
| USXWO | Wolcott | CT |
| USOJO | Wolcott | IN |
| USOOT | Wolcott | NY |
| US8WT | Wolcott | VT |
| USTIE | Wolcottville | IN |
| USWZB | Wolf Creek | KY |
| USWL8 | Wolf Lake | IL |
| USOLF | Wolf Point | MT |
| USV67 | Wolfe City | TX |
| USWFB | Wolfeboro | NH |
| USWOF | Wolfforth | TX |
| USWDF | Womelsdorf | PA |
| USQOK | Wonder Lake | IL |
| USWOG | Wonewoc | WI |
| USWDD | Wood Dale | IL |
| USWRV | Wood River | IL |
| USWR7 | Wood River | NE |
| USWJU | Wood River Junction | RI |
| USYWT | Winthrop | IA |
| USIHP | Winthrop | MA |
| USIRP | Winthrop | ME |
| USWIG | Winthrop | MN |
| USWPX | Winthrop Harbor | IL |
| USWXZ | Winton | CA |
| US5WT | Winton | MN |
| USTWQ | Winton | NC |
| USVWW | Wirtz | VA |
| USISS | Wiscasset | ME |
| USWNF | Wisconsin Dells | WI |
| USISW | Wisconsin Rapids | WI |
| USLNP | Wise | VA |
| USWXK | Wishek | ND |
| USWIZ | Wissahickon | PA |
| USJTR | Wister | OK |
| USW44 | Withee | WI |
| USWB2 | Wittenberg | WI |
| US4WM | Wittman | MD |
| USWTJ | Wittmann | AZ |
| USWXT | Winston | NM |
| USWQT | Winston | OR |
| USINT | Winston Salem | NC |
| USWTG | Winter Garden | FL |
| USWH5 | Winter Harbor | ME |