| Code | Name | Region |
|---|---|---|
| USXCV | Bardstown | KY |
| USB6R | Bargersville | IN |
| USBK9 | Barker | NY |
| USB9K | Barker | TX |
| USVQL | Barkeyville | PA |
| USBH5 | Barkhamsted | CT |
| USZA2 | Barling | AR |
| USKB5 | Barlow | KY |
| USZ2A | Baltimore | NY |
| USBZB | Baltimore | OH |
| USBWI | Baltimore-washington Int Apt | MD |
| USBBM | Bamberg | SC |
| USRT2 | Bancroft | IA |
| USXRF | Bancroft | ID |
| USFBT | Bancroft | MI |
| USJNF | Bancroft | WI |
| USZGM | Bandera | TX |
| USBDY | Bandon | OR |
| USBGR | Bangor | ME |
| USBNQ | Bangor | MI |
| USQGR | Bangor | PA |
| USBG2 | Bangor | WI |
| USNKS | Banks | OR |
| USBE2 | Banner Elk | NC |
| USBNG | Banning | CA |
| USIBI | Bannister | MI |
| USBNN | Bannockburn | IL |
| USYBM | Bantam | CT |
| USQAK | Balko | OK |
| USBA9 | Ball | LA |
| USBBN | Ball Ground | GA |
| USQLL | Ballard | CA |
| USAFY | Ballard/seattle | WA |
| USGXD | Ballground | MS |
| USB5A | Ballico | CA |
| USBLR | Ballinger | TX |
| USBZK | Ballouville | CT |
| US2BY | Ballston Lake | NY |
| USBQY | Ballston Spa | NY |
| USBLL | Ballwin | MO |
| USBLY | Bally | PA |
| USXBS | Balmat | NY |
| USBA7 | Balmorhea | TX |
| US9BK | Balsam Lake | WI |
| USQBM | Baltic | CT |
| USQBC | Baltic | OH |
| USB7C | Baltic | SD |
| USBAL | Baltimore | MD |
| USFL8 | Bal Harbour | FL |
| USZBC | Bala-cynwyd | PA |