word | | Nationality |
| Bangladeshi | Bangladesh | noun: Bangladeshi(s) adjective: Bangladeshi |
| Barbadian | Barbados | noun: Barbadian(s) or Bajan (colloquial) adjective: Barbadian or Bajan (colloquial) |
| Barbudan | Antigua and Barbuda | noun: Antiguan(s), Barbudan(s) adjective: Antiguan, Barbudan |
| Basotho | Lesotho | noun: Mosotho (singular), Basotho (plural) adjective: Basotho |
| Batswana | Botswana | noun: Motswana (singular), Batswana (plural) adjective: Motswana (singular), Batswana (plural) |
| Belarusian | Belarus | noun: Belarusian(s) adjective: Belarusian |
| Belgian | Belgium | noun: Belgian(s) adjective: Belgian |
| Belizean | Belize | noun: Belizean(s) adjective: Belizean |
| Beninese | Benin | noun: Beninese (singular and plural) adjective: Beninese |
| Bermudian | Bermuda | noun: Bermudian(s) adjective: Bermudian |
| Bhutanese | Bhutan | noun: Bhutanese (singular and plural) adjective: Bhutanese |
| Bolivian | Bolivia | noun: Bolivian(s) adjective: Bolivian |
| Bosnian | Bosnia and Herzegovina | noun: Bosnian(s), Herzegovinian(s) adjective: Bosnian, Herzegovinian |
| Brazilian | Brazil | noun: Brazilian(s) adjective: Brazilian |
| British | British Virgin Islands | noun: British Virgin Islander(s) adjective: British Virgin Islander |