| Code | Name | Region |
|---|---|---|
| USBTL | Battle Creek | MI |
| USBN9 | Battle Ground | IN |
| USBRU | Battle Ground | WA |
| USBAM | Battle Mountain | NV |
| USBBO | Battleboro | NC |
| USTVW | Battletown | KY |
| USBDE | Baudette | MN |
| USBXT | Bauxite | AR |
| USQBA | Baskin | LA |
| USBSK | Basking Ridge | NJ |
| USB6M | Basom | NY |
| US9HA | Bass Harbor | ME |
| USBAC | Bassett | CA |
| USBB9 | Bassett | NE |
| USBSS | Bassett | VA |
| USBD4 | Bassfield | MS |
| USBCP | Bastian | VA |
| USBAS | Bastrop | LA |
| USZBP | Bastrop | TX |
| US8AS | Basye | VA |
| USBTA | Batavia | IL |
| USBIA | Batavia | NY |
| USBUX | Batavia | OH |
| USBC9 | Batchelor | LA |
| USB3C | Bates City | MO |
| USBBG | Batesburg | SC |
| USBTS | Batesville | AR |
| USHLB | Batesville | IN |
| USBSZ | Bartletts | AK |
| USB34 | Bartlettsville | IN |
| USJBA | Barto | PA |
| USAQT | Barton | AL |
| USOBN | Barton | AR |
| US9BT | Barton | OH |
| US8TN | Barton | VT |
| USPE8 | Bartonsville | PA |
| USBCJ | Bartonville | IL |
| USXB3 | Bartonville | TX |
| USBOW | Bartow | FL |
| USABO | Bartow | GA |
| USYTJ | Bartow | WV |
| USKBW | Barwick | GA |
| USZBS | Basalt | CO |
| USB7A | Basalt | NV |
| USB4A | Basco | IL |
| USBSC | Bascom | OH |
| USXBR | Basin | WY |
| USBBS | Basin City | WA |
| USVBR | Barre | VT |
| USBJA | Barree | PA |