word | | Country name |
| form | Belgium | conventional long form: Kingdom of Belgium conventional short form: Belgium local long form: Royaume de Belgique/Koninkrijk Belgie local short form: Belgique/Belgie |
| form | Belize | conventional long form: none conventional short form: Belize former: British Honduras |
| form | Benin | conventional long form: Republic of Benin conventional short form: Benin local long form: Republique du Benin local short form: Benin former: Dahomey |
| form | Bermuda | conventional long form: none conventional short form: Bermuda former: Somers Islands |
| form | Bhutan | conventional long form: Kingdom of Bhutan conventional short form: Bhutan local long form: Druk Gyalkhap local short form: Druk Yul |
| form | Bolivia | conventional long form: Plurinational State of Bolivia conventional short form: Bolivia local long form: Estado Plurinacional de Bolivia local short form: Bolivia |
| form | 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 ... |
| form | Botswana | conventional long form: Republic of Botswana conventional short form: Botswana local long form: Republic of Botswana local short form: Botswana former: Bechuanaland |
| form | Bouvet Island | conventional long form: none conventional short form: Bouvet Island |
| form | Brazil | conventional long form: Federative Republic of Brazil conventional short form: Brazil local long form: Republica Federativa do Brasil local short form: Brasil |