local short form: Al Bahrayn
former: Dilmun

Baker Island
conventional long form: none
conventional short form: Baker Island

Bangladesh
conventional long form: People's Republic of Bangladesh
conventional short form: Bangladesh
former: East Pakistan

Barbados
conventional long form: none
conventional short form: Barbados

Bassas da India
conventional long form: none
conventional short form: Bassas da India

Belarus
conventional long form: Republic of Belarus
conventional short form: Belarus
local long form: Respublika Byelarus'
local short form: none
former: Belorussian (Byelorussian) Soviet Socialist Republic

Belgium
conventional long form: Kingdom of Belgium
conventional short form: Belgium
local long form: Royaume de Belgique/Koninkrijk Belgie
local short form: Belgique/Belgie

Belize
conventional long form: none
conventional short form: Belize
former: British Honduras

Benin
conventional long form: Republic of Benin
conventional short form: Benin
local long form: Republique du Benin
local short form: Benin
former: Dahomey

Bermuda
conventional long form: none
conventional short form: Bermuda
former: Somers Islands

Bhutan
conventional long form: Kingdom of Bhutan
conventional short form: Bhutan

Bolivia
conventional long form: Republic of Bolivia
conventional short form: Bolivia
local long form: Republica de Bolivia
local short form: Bolivia

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 and Herzegovina

Botswana
conventional long form: Republic of Botswana
conventional short form: Botswana
former: Bechuanaland

Bouvet Island
conventional long form: none
conventional short form: Bouvet Island

Brazil
conventional long form: Federative Republic of Brazil
conventional short form: Brazil
local long form: Republica Federativa do Brasil
local short form: Brasil

British Indian Ocean Territory
conventional long form: British
Indian Ocean Territory
conventional short form: none
abbreviation: BIOT

British Virgin Islands
conventional long form: none
conventional short form: British Virgin Islands
abbreviation: BVI

Brunei
conventional long form: Negara Brun