| Code | Name | Region |
|---|---|---|
| USOWR | Bowling Green | IN |
| USBWG | Bowling Green | KY |
| USOWL | Bowling Green | MO |
| USBWO | Bowling Green | OH |
| USAPH | Bowling Green | VA |
| USOWM | Bowman | GA |
| USBWM | Bowman | ND |
| USQWM | Bowman | SC |
| USBMW | Bowmanstown | PA |
| USOQI | Bowmansville | NY |
| USBWV | Bowmansville | PA |
| USB2X | Box Elder | SD |
| USBXP | Box Springs | CA |
| US9BS | Box Springs | GA |
| USBXC | Boxboro | MA |
| US9BX | Boxborough | MA |
| US3XF | Boxford | MA |
| USOYC | Boyce | LA |
| USUSA | Bourbonnais | IL |
| USBOR | Bourg | LA |
| USBO4 | Bourne | MA |
| USXUS | Bouse | AZ |
| USBJ9 | Bouton | IA |
| USTUB | Boutte | LA |
| USB9V | Bovill | ID |
| USOVC | Bovina Center | NY |
| USBOX | Bow | NH |
| USBW9 | Bow | WA |
| USBC3 | Bow Center | NH |
| USB9W | Bowdle | SD |
| US8BO | Bowdoin | ME |
| USLJG | Bowdoinham | ME |
| USBGD | Bowdon | GA |
| USBWN | Bowerston | OH |
| USQBW | Bowersville | GA |
| USAGF | Bowie | AZ |
| USBQA | Bowie | MD |
| USTXB | Bowie | TX |
| USB8W | Bostwick | FL |
| USBZS | Boswell | IN |
| USOS6 | Boswell | OK |
| USPBS | Boswell | PA |
| USBSW | Boswell Bay | AK |
| USOTU | Botetourt | VA |
| USYTH | Bothell | WA |
| USBTK | Botkins | OH |
| USBOF | Botsford | CT |
| USB4O | Bottineau | ND |
| USWBU | Boulder | CO |
| USBLD | Boulder City | NV |