| Country | Legal system |
| Afghanistan | based on mixed civil and Sharia law; has not accepted compulsory ICJ jurisdiction |
| Akrotiri | the Sovereign Base Area Administration has its own court system to deal with civil and criminal matters; laws applicable to the Cypriot population are, as far as possible, the same as the laws of the Republic of Cyprus |
| Albania | has a civil law system; has not accepted compulsory ICJ jurisdiction; has accepted jurisdiction of the International Criminal Court for its citizens |
| Algeria | socialist, based on French and Islamic law; judicial review of legislative acts in ad hoc Constitutional Council composed of various public officials including several Supreme Court justices; has not accepted compulsory ICJ jurisdiction |
| American Samoa | NA |
| Andorra | based on French and Spanish civil codes; no judicial review of legislative acts; has not accepted compulsory ICJ jurisdiction |
| Angola | based on Portuguese civil law system and customary law; modified to accommodate political pluralism and increased use of free markets; has not accepted compulsory ICJ jurisdiction |
| Anguilla | based on English common law |