Without upper houses
| No Upper House |
|---|
| Bangladesh (Muslim/Common Law) |
| Brunei (Muslim/Common Law/Customary) |
| Burkina Faso (Civil/Customary) |
| China (Civil/Customary) |
| Cyprus (Common Law/Civil) |
| Comoros Islands (Civil/Muslim) |
| North Korea (Civil/Customary) |
| South Korea (Civil/Customary) |
| Ivory Coast (Civil/Customary) |
| Djibouti (Civil/Muslim/Customary) |
| Egypt (Muslim/Civil) |
| United Arab Emirates (Muslim/Customary) |
| Eritrea (Civil/Customary/Muslim) |
| Gambia (Muslim/Common Law/Customary) |
| Ghana (Common Law/Customary) |
| Guinea (Civil/Customary) |
| Equatorial Guinea (Civil/Customary) |
| Guinea Bissau (Civil/Customary) |
| Guyana (Common Law/Civil) |
| Indonesia (Civil/Muslim/Customary) |
| Iran (Muslim/Civil) |
| Iraq (Muslim/Civil) |
| Israel (Civil/Common Law/Jewish/Muslim) |
| Kuwait (Muslim/Civil/Customary) |
| Lebanon (Civil/Muslim) |
| Malawi (Common Law/Customary) |
| Mali (Civil/Customary) |
| Malta (Civil/Common Law) |
| Mauritius (Civil/Common Law) |
| Mauritania (Civil/Muslim) |
| Micronesia (Common Law/Customary) |
| Mongolia (Civil/Customary) |
| Mozambique (Civil/Customary) |
| Niger (Civil/Customary) |
| Uganda (Common Law/Customary) |
| Palestinian Authority (Civil/Muslim) |
| Papua New Guinea (Customary/Common Law) |
| Solomon Islands (Common Law/Customary) |
| Samoa (Common Law/Customary) |
| Sao Tome and Principe (Civil/Customary) |
| Senegal (Civil/Customary) |
| Seychelles (Common Law/Civil) |
| Sierra Leone (Common Law/Customary) |
| Singapore (Common Law/Muslim) |
| Sri Lanka (Civil/Common Law/Customary) |
| Syria (Civil/Muslim) |
| Tanzania (Common Law/Customary) |
| Chad (Civil/Customary) |
| East Timor (Civil/Muslim/Customary) |
| Togo (Civil/Customary) |
| Tunisia (Civil/Muslim) |
| Vanuatu (Civil/Customary/Common Law) |
| Zambia (Common Law/Customary) |
| 1 to 20 (54) |