word | | Country name |
| Bailiwick | Guernsey | conventional long form: Bailiwick of Guernsey conventional short form: Guernsey |
| Bailiwick | Jersey | conventional long form: Bailiwick of Jersey conventional short form: Jersey |
| Baker | United States Pacific Island Wildlife Refuges | conventional long form: none conventional short form: Baker Island; Howland Island; Jarvis Island; Johnston Atoll; Kingman Reef; Midway Islands; Palmyra Atoll |
| Balgariya | Bulgaria | conventional long form: Republic of Bulgaria conventional short form: Bulgaria local long form: Republika Balgariya local short form: Balgariya |
| Banda | Uruguay | conventional long form: Oriental Republic of Uruguay conventional short form: Uruguay local long form: Republica Oriental del Uruguay local short form: Uruguay former: Banda Oriental, Cisplatine Province |
| Bangladesh | Bangladesh | conventional long form: People's Republic of Bangladesh conventional short form: Bangladesh local long form: Gana Prajatantri Banladesh local short form: Banladesh former: East Bengal, East Pakistan |
| Bank | West Bank | conventional long form: none conventional short form: West Bank |
| Banladesh | Bangladesh | conventional long form: People's Republic of Bangladesh conventional short form: Bangladesh local long form: Gana Prajatantri Banladesh local short form: Banladesh former: East Bengal, East Pakistan |
| Barbados | Barbados | conventional long form: none conventional short form: Barbados |
| Barbuda | Antigua and Barbuda | conventional long form: none conventional short form: Antigua and Barbuda |
| Barthelemy | Saint Barthelemy | conventional long form: Overseas Collectivity of Saint Barthelemy conventional short form: Saint Barthelemy local long form: Collectivite d'outre mer de Saint-Barthelemy local short form: Saint-Barthelemy |
| Base | Akrotiri | conventional long form: Akrotiri Sovereign Base Area conventional short form: Akrotiri |