| Country | Nationality |
| Barbados | noun: Barbadian(s) or Bajan (colloquial) adjective: Barbadian or Bajan (colloquial) |
| Belarus | noun: Belarusian(s) adjective: Belarusian |
| Belgium | noun: Belgian(s) adjective: Belgian |
| Belize | noun: Belizean(s) adjective: Belizean |
| Benin | noun: Beninese (singular and plural) adjective: Beninese |
| Bermuda | noun: Bermudian(s) adjective: Bermudian |
| Bhutan | noun: Bhutanese (singular and plural) adjective: Bhutanese |
| Bolivia | noun: Bolivian(s) adjective: Bolivian |
| Bosnia and Herzegovina | noun: Bosnian(s), Herzegovinian(s) adjective: Bosnian, Herzegovinian |
| Botswana | noun: Motswana (singular), Batswana (plural) adjective: Motswana (singular), Batswana (plural) |
| Bouvet Island | void |
| Brazil | noun: Brazilian(s) adjective: Brazilian |
| British Indian Ocean Territory | void |
| British Virgin Islands | noun: British Virgin Islander(s) adjective: British Virgin Islander |
| Brunei | noun: Bruneian(s) adjective: Bruneian |
| Bulgaria | noun: Bulgarian(s) adjective: Bulgarian |
| Burkina Faso | noun: Burkinabe (singular and plural) adjective: Burkinabe |
| Burma | noun: Burmese (singular and plural) adjective: Burmese |
| Burundi | noun: Burundian(s) adjective: Burundian |
| Cambodia | noun: Cambodian(s) adjective: Cambodian |
| Cameroon | noun: Cameroonian(s) adjective: Cameroonian |
| Canada | noun: Canadian(s) adjective: Canadian |