| Country | Legal system |
| Mozambique | mixed legal system of Portuguese civil law, Islamic law, and customary law |
| Namibia | mixed legal system of uncodified civil law based on Roman-Dutch law and customary law |
| Nauru | mixed legal system of common law based on the English model and customary law |
| Navassa Island | the laws of the US, where applicable, apply |
| Nepal | English common law and Hindu legal concepts |
| Netherlands | civil law system based on the French system; constitution does not permit judicial review of acts of the States General |
| New Caledonia | civil law system based on French law; the 1988 Matignon Accords grant substantial autonomy to the islands |
| New Zealand | common law system, based on English model, with special legislation and land courts for the Maori |
| Nicaragua | civil law system; Supreme Court may review administrative acts |
| Niger | mixed legal system of civil law (based on French civil law), Islamic law, and customary law |
| Nigeria | mixed legal system of English common law, Islamic law (in 12 northern states), and traditional law |
| Niue | English common law |
| Norfolk Island | English common law and the laws of Australia |
| Northern Mariana Islands | US system applies, except for customs, wages, immigration laws, and taxation |
| Norway | mixed legal system of civil, common, and customary law; Supreme Court can advise on legislative acts |
| Oman | mixed legal system of Anglo-Saxon law and Islamic law |
| Pacific Ocean | void |
| Pakistan | common law system with Islamic law influence |
| Palau | mixed legal system of civil, common, and customary law |
| Panama | civil law system; judicial review of legislative acts in the Supreme Court of Justice |
| Papua New Guinea | mixed legal system of English common law and customary law |