| Country | Legal system |
| Kuwait | civil law system with Islamic law significant in personal matters; has not accepted compulsory ICJ jurisdiction |
| Kyrgyzstan | based on French and Russian laws; has not accepted compulsory ICJ jurisdiction |
| Laos | based on traditional customs, French legal norms and procedures, and socialist practice; has not accepted compulsory ICJ jurisdiction |
| Latvia | based on civil law system with traces of Socialist legal traditions and practices; has not accepted compulsory ICJ jurisdiction |
| Lebanon | mixture of Ottoman law, canon law, Napoleonic code, and civil law; no judicial review of legislative acts; has not accepted compulsory ICJ jurisdiction |
| Lesotho | based on English common law and Roman-Dutch law; judicial review of legislative acts in High Court and Court of Appeal; accepts compulsory ICJ jurisdiction with reservations |
| Liberia | dual system of statutory law based on Anglo-American common law for the modern sector and customary law based on unwritten tribal practices for indigenous sector; accepts compulsory ICJ jurisdiction with reservations |
| Libya | based on Italian and French civil law systems and Islamic law; separate religious courts; no constitutional provision for judicial review of legislative acts; has not accepted compulsory ICJ jurisdiction |
| Liechtenstein | local civil and penal codes based on civil law system; accepts compulsory ICJ jurisdiction with reservations |
| Lithuania | based on civil law system; legislative acts can be appealed to the constitutional court; has not accepted compulsory ICJ jurisdiction |
| Luxembourg | based on civil law system; accepts compulsory ICJ jurisdiction |
| Macau | based on Portuguese civil law system |
| Macedonia | based on civil law system; judicial review of legislative acts; has not accepted compulsory ICJ jurisdiction |
| Madagascar | based on French civil law system and traditional Malagasy law; accepts compulsory ICJ jurisdiction with reservations |
| Malawi | based on English common law and customary law; judicial review of legislative acts in the Supreme Court of Appeal; accepts compulsory ICJ jurisdiction with reservations |
| Malaysia | based on English common law; judicial review of legislative acts in the Supreme Court at request of supreme head of the federation; Islamic law is applied to Muslims in matters of family law and religion; has not accepted compulsory ICJ jurisdiction |
| Maldives | based on Islamic law with admixtures of English common law primarily in commercial matters; has not accepted compulsory ICJ jurisdiction |
| Mali | based on French civil law system and customary law; judicial review of legislative acts in Constitutional Court; has not accepted compulsory ICJ jurisdiction |
| Malta | based on English common law and Roman civil law; accepts compulsory ICJ jurisdiction with reservations |
| Marshall Islands | based on adapted Trust Territory laws, acts of the legislature, municipal, common, and customary laws; has not accepted compulsory ICJ jurisdiction |
| Mauritania | a combination of Islamic law and French civil law; has not accepted compulsory ICJ jurisdiction |
| Mauritius | based on French civil law system with elements of English common law in certain areas; accepts compulsory ICJ jurisdiction with reservations |
| Mayotte | the laws of France, where applicable, apply |
| Mexico | mixture of US constitutional theory and civil law system; judicial review of legislative acts; accepts compulsory ICJ jurisdiction with reservations |
| Micronesia, Federated States of | based on adapted Trust Territory laws, acts of the legislature, municipal, common, and customary laws; has not accepted compulsory ICJ jurisdiction |