word | | Country name |
| short | Armenia | conventional long form: Republic of Armenia conventional short form: Armenia local long form: Hayastani Hanrapetut'yun local short form: Hayastan former: Armenian Soviet Socialist Republic, Armenian Republic |
| short | Aruba | conventional long form: none conventional short form: Aruba |
| short | Ashmore and Cartier Islands | conventional long form: Territory of Ashmore and Cartier Islands conventional short form: Ashmore and Cartier Islands |
| short | Australia | conventional long form: Commonwealth of Australia conventional short form: Australia |
| short | Austria | conventional long form: Republic of Austria conventional short form: Austria local long form: Republik Oesterreich local short form: Oesterreich |
| short | Azerbaijan | conventional long form: Republic of Azerbaijan conventional short form: Azerbaijan local long form: Azarbaycan Respublikasi local short form: Azarbaycan former: Azerbaijan Soviet Socialist Republic |
| short | Bahamas, The | conventional long form: Commonwealth of The Bahamas conventional short form: The Bahamas |
| short | Bahrain | conventional long form: Kingdom of Bahrain conventional short form: Bahrain local long form: Mamlakat al Bahrayn local short form: Al Bahrayn former: Dilmun |
| short | 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 |
| short | Barbados | conventional long form: none conventional short form: Barbados |
| short | Belarus | conventional long form: Republic of Belarus conventional short form: Belarus local long form: Respublika Byelarus' local short form: Byelarus' former: Belorussian (Byelorussian) Soviet Socialist Republic |
| short | Belgium | conventional long form: Kingdom of Belgium conventional short form: Belgium local long form: Royaume de Belgique/Koninkrijk Belgie local short form: Belgique/Belgie |
| short | Belize | conventional long form: none conventional short form: Belize former: British Honduras |
| short | Benin | conventional long form: Republic of Benin conventional short form: Benin local long form: Republique du Benin local short form: Benin former: Dahomey |
| short | Bermuda | conventional long form: none conventional short form: Bermuda former: Somers Islands |
| short | Bhutan | conventional long form: Kingdom of Bhutan conventional short form: Bhutan local long form: Druk Gyalkhap local short form: Druk Yul |
| short | Bolivia | conventional long form: Republic of Bolivia conventional short form: Bolivia local long form: Republica de Bolivia local short form: Bolivia |
| short | Bosnia and Herzegovina | conventional long form: none conventional short form: Bosnia and Herzegovina local long form: none local short form: Bosna i Hercegovina former: People's Republic of Bosnia and Herzegovina, Socialist Republic of Bosnia ... |
| short | Botswana | conventional long form: Republic of Botswana conventional short form: Botswana local long form: Republic of Botswana local short form: Botswana former: Bechuanaland |
| short | Bouvet Island | conventional long form: none conventional short form: Bouvet Island |
| short | Brazil | conventional long form: Federative Republic of Brazil conventional short form: Brazil local long form: Republica Federativa do Brasil local short form: Brasil |
| short | British Indian Ocean Territory | conventional long form: British Indian Ocean Territory conventional short form: none abbreviation: BIOT |
| short | British Virgin Islands | conventional long form: none conventional short form: British Virgin Islands abbreviation: BVI |
| short | Brunei | conventional long form: Brunei Darussalam conventional short form: Brunei local long form: Negara Brunei Darussalam local short form: Brunei |
| short | Bulgaria | conventional long form: Republic of Bulgaria conventional short form: Bulgaria local long form: Republika Balgariya local short form: Balgariya |