| Code | Name | Region |
|---|---|---|
| USBAZ | Balboa | CA |
| USBPN | Balch Springs | TX |
| USZBB | Bald Knob | AR |
| USBAX | Baldwin | FL |
| USBBJ | Baldwin | GA |
| USZBN | Baldwin | IL |
| USLDK | Baldwin | LA |
| USAWI | Baldwin | MI |
| USBZQ | Baldwin | ND |
| USBAD | Baldwin | NY |
| USBAQ | Baldwin | SC |
| USZBW | Baldwin | WI |
| USBZI | Baldwin City | KS |
| USBWP | Baldwin Park | CA |
| USBDV | Baldwinsville | NY |
| USAWV | Baldwinville | MA |
| USBWU | Baldwyn | MS |
| USBAW | Balfour | NC |
| USB9G | Bainbridge | PA |
| USBII | Bainbridge Island | WA |
| USBJ2 | Bairdsville | NJ |
| USNGH | Baiting Hollow | NY |
| USBA5 | Baker | CA |
| USBKG | Baker | FL |
| USBKM | Baker | LA |
| USBK3 | Baker | MT |
| USB2K | Baker | NV |
| USBKE | Baker | OR |
| USBK4 | Baker City | OH |
| USY9K | Baker City | OR |
| USB6H | Baker Hill | AL |
| USBAR | Baker Island | AK |
| USBFL | Bakersfield | CA |
| US7BK | Bakersfield | VT |
| USBKP | Bakerstown | PA |
| USBE9 | Bakersville | NC |
| USKRS | Bakersville | OH |
| USQBZ | Bakewell | TN |
| USBF9 | Bacliff | TX |
| USBO5 | Baconton | GA |
| USBQV | Bacova | VA |
| USBAA | Bad Axe | MI |
| USBAE | Baden | PA |
| USBAN | Badin | NC |
| USBGT | Bagdad | AZ |
| USBAG | Bagdad | PA |
| USXAG | Bagley | IA |
| USGAJ | Bagley | MN |
| USB7M | Bahama | NC |
| USYB2 | Bailey | CO |