| Country | Judicial branch |
| Mexico | Supreme Court of Justice or Suprema Corte de Justicia de la Nacion (justices or ministros are appointed by the president with consent of the Senate) |
| Micronesia, Federated States of | Supreme Court |
| Moldova | Supreme Court; Constitutional Court (the sole authority for constitutional judicature) |
| Monaco | Supreme Court or Tribunal Supreme (judges appointed by the monarch on the basis of nominations by the National Council) |
| Mongolia | Supreme Court (serves as appeals court for people's and provincial courts but rarely overturns verdicts of lower courts; judges are nominated by the General Council of Courts and approved by the president) |
| Montenegro | Constitutional Court (five judges serve nine-year terms); Supreme Court (judges have life tenure) |
| Montserrat | Eastern Caribbean Supreme Court (based in Saint Lucia, one judge of the Supreme Court is a resident of the islands and presides over the High Court) |
| Morocco | Supreme Court (judges are appointed on the recommendation of the Supreme Council of the Judiciary, presided over by the monarch) |
| Mozambique | Supreme Court (the court of final appeal; some of its professional judges are appointed by the president, and some are elected by the Assembly); other courts include an Administrative Court, Constitutional Court, customs courts, maritime courts, courts marshal, labor courts |
| Namibia | Supreme Court (judges appointed by the president on the recommendation of the Judicial Service Commission) |
| Nauru | Supreme Court |
| Navassa Island | void |
| Nepal | Supreme Court or Sarbochha Adalat (the president appoints the chief justice on recommendation of the Constitutional Council; the chief justice appoints other judges on the recommendation of the Judicial Council) |
| Netherlands | Supreme Court or Hoge Raad (justices are nominated for life by the monarch) |
| New Caledonia | Court of Appeal or Cour d'Appel; County Courts; Joint Commerce Tribunal Court; Children's Court |
| New Zealand | Supreme Court; Court of Appeal; High Court; note - judges appointed by the governor general |