| Country | Legal system |
| Benin | civil law system modeled largely on the French system and some customary law |
| Bermuda | English common law |
| Bhutan | civil law based on Buddhist religious law |
| Bolivia | civil law system with influences from Roman, Spanish, canon (religious), French, and indigenous law |
| Bosnia and Herzegovina | civil law system; Constitutional Court review of legislative acts |
| Botswana | mixed legal system of civil law influenced by the Roman-Dutch model and also customary and common law |
| Bouvet Island | the laws of Norway, where applicable, apply |
| Brazil | civil law; note - a new Brazilian civil law code was enacted in 2002 replacing the 1916 code |
| British Indian Ocean Territory | the laws of the UK, where applicable, apply |
| British Virgin Islands | English common law |
| Brunei | mixed legal system based on English common law and Islamic law |
| Bulgaria | civil law |
| Burkina Faso | civil law based on the French model and customary law |
| Burma | mixed legal system of English common law (as introduced in codifications designed for colonial India) and customary law |
| Burundi | mixed legal system of Belgian civil law and customary law |
| Cambodia | civil law system (influenced by the UN Transitional Authority in Cambodia) customary law, Communist legal theory, and common law |
| Cameroon | mixed legal system of English common law, French civil law, and customary law |
| Canada | common law system except in Quebec where civil law based on the French civil code prevails |
| Cape Verde | civil law system of Portugal |
| Cayman Islands | English common law and local statutes |