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| Member State | Party to LOSC Date | Party to Agreement Date | Regional Group |
|---|---|---|---|
| Albania | Eastern European Group | ||
| Algeria | African Group | ||
| Angola | African Group | ||
| Antigua and Barbuda | Latin American and Caribbean States Group | ||
| Argentina | Latin American and Caribbean States Group | ||
| Armenia | Eastern European Group | ||
| Australia | Western European and Other States Group | ||
| Austria | Western European and Other States Group | ||
| Azerbaijan | Eastern European Group | ||
| Bahamas | Latin American and Caribbean States Group | ||
| Bahrain | Asia-Pacific Group | ||
| Bangladesh | Asia-Pacific Group | ||
| Barbados | Latin American and Caribbean States Group | ||
| Belarus | Eastern European Group | ||
| Belgium | Western European and Other States Group | ||
| Belize | Latin American and Caribbean States Group | ||
| Benin | African Group | ||
| Bolivia (Purinational State of) | Latin American and Caribbean States Group | ||
| Bosnia and Herzegovina | Eastern European Group | ||
| Botswana | African Group | ||
| Brazil | Latin American and Caribbean States Group | ||
| Brunei Darussalam | Asia-Pacific Group | ||
| Bulgaria | Eastern European Group | ||
| Burkina Faso | African Group | ||
| Cabo Verde | African Group | ||
| Cameroon | African Group | ||
| Canada | Western European and Other States Group | ||
| Chad | African Group | ||
| Chile | Latin American and Caribbean States Group | ||
| China | Asia-Pacific Group | ||
| Comoros | African Group | ||
| Congo | African Group | ||
| Cook Islands | Asia-Pacific Group | ||
| Costa Rica | Latin American and Caribbean States Group | ||
| Côte d’Ivoire | African Group | ||
| Croatia | Eastern European Group | ||
| Cuba | Latin American and Caribbean States Group | ||
| Cyprus | Asia-Pacific Group | ||
| Czech Republic | Eastern European Group | ||
| Democratic Republic of the Congo | African Group | ||
| Denmark | Western European and Other States Group | ||
| Djibouti | African Group | ||
| Dominica | Latin American and Caribbean States Group | ||
| Dominican Republic | Latin American and Caribbean States Group | ||
| Ecuador | Latin American and Caribbean States Group | ||
| Egypt | African Group | ||
| Equatorial Guinea | African Group | ||
| Estonia | Eastern European Group | ||
| Eswatini | African Group | ||
| European Union | |||
| Fiji | Asia-Pacific Group | ||
| Finland | Western European and Other States Group | ||
| France | Western European and Other States Group | ||
| Gabon | African Group | ||
| Gambia | African Group | ||
| Georgia | Eastern European Group | ||
| Germany | Western European and Other States Group | ||
| Ghana | African Group | ||
| Greece | Western European and Other States Group | ||
| Grenada | Latin American and Caribbean States Group | ||
| Guatemala | Latin American and Caribbean States Group | ||
| Guinea | African Group | ||
| Guinea-Bissau | African Group | ||
| Guyana | Latin American and Caribbean States Group | ||
| Haiti | Latin American and Caribbean States Group | ||
| Honduras | Latin American and Caribbean States Group | ||
| Hungary | Eastern European Group | ||
| Iceland | Western European and Other States Group | ||
| India | Asia-Pacific Group | ||
| Indonesia | Asia-Pacific Group | ||
| Iraq | Asia-Pacific Group | ||
| Ireland | Western European and Other States Group | ||
| Italy | Western European and Other States Group | ||
| Jamaica | Latin American and Caribbean States Group | ||
| Japan | Asia-Pacific Group | ||
| Jordan | Asia-Pacific Group | ||
| Kenya | African Group | ||
| Kiribati | Asia-Pacific Group | ||
| Kuwait | Asia-Pacific Group | ||
| Lao People's Democratic Republic | Asia-Pacific Group | ||
| Latvia | Eastern European Group | ||
| Lebanon | Asia-Pacific Group | ||
| Lesotho | African Group | ||
| Liberia | African Group | ||
| Lithuania | Eastern European Group | ||
| Luxembourg | Western European and Other States Group | ||
| Madagascar | African Group | ||
| Malawi | African Group | ||
| Malaysia | Asia-Pacific Group | ||
| Maldives | Asia-Pacific Group | ||
| Mali | African Group | ||
| Malta | Western European and Other States Group | ||
| Marshall Islands | Asia-Pacific Group | ||
| Mauritania | African Group | ||
| Mauritius | African Group | ||
| Mexico | Latin American and Caribbean States Group | ||
| Micronesia (Federated States of) | Asia-Pacific Group | ||
| Monaco | Western European and Other States Group | ||
| Mongolia | Asia-Pacific Group | ||
| Montenegro | Eastern European Group | ||
| Morocco | African Group | ||
| Mozambique | African Group | ||
| Myanmar | Asia-Pacific Group | ||
| Namibia | African Group | ||
| Nauru | Asia-Pacific Group | ||
| Nepal | Asia-Pacific Group | ||
| Netherlands | Western European and Other States Group | ||
| New Zealand | Western European and Other States Group | ||
| Nicaragua | Latin American and Caribbean States Group | ||
| Niger | African Group | ||
| Nigeria | African Group | ||
| Niue | Asia-Pacific Group | ||
| North Macedonia | Eastern European Group | ||
| Norway | Western European and Other States Group | ||
| Oman | Asia-Pacific Group | ||
| Pakistan | Asia-Pacific Group | ||
| Palau | Asia-Pacific Group | ||
| Panama | Latin American and Caribbean States Group | ||
| Papua New Guinea | Asia-Pacific Group | ||
| Paraguay | Latin American and Caribbean States Group | ||
| Philippines | Asia-Pacific Group | ||
| Poland | Eastern European Group | ||
| Portugal | Western European and Other States Group | ||
| Qatar | Asia-Pacific Group | ||
| Republic of Korea | Asia-Pacific Group | ||
| Republic of Moldova | Eastern European Group | ||
| Romania | Eastern European Group | ||
| Russian Federation | Eastern European Group | ||
| Saint Kitts and Nevis | Latin American and Caribbean States Group | ||
| Saint Lucia | Latin American and Caribbean States Group | ||
| Saint Vincent and the Grenadines | Latin American and Caribbean States Group | ||
| Samoa | Asia-Pacific Group | ||
| Sao Tome and Principe | African Group | ||
| Saudi Arabia | Asia-Pacific Group | ||
| Senegal | African Group | ||
| Serbia | Eastern European Group | ||
| Seychelles | African Group | ||
| Sierra Leone | African Group | ||
| Singapore | Asia-Pacific Group | ||
| Slovakia | Eastern European Group | ||
| Slovenia | Eastern European Group | ||
| Solomon Islands | Asia-Pacific Group | ||
| Somalia | African Group | ||
| South Africa | African Group | ||
| Spain | Western European and Other States Group | ||
| Sri Lanka | Asia-Pacific Group | ||
| State of Palestine | Asia-Pacific Group | ||
| Sudan | African Group | ||
| Suriname | Latin American and Caribbean States Group | ||
| Sweden | Western European and Other States Group | ||
| Switzerland | Western European and Other States Group | ||
| Thailand | Asia-Pacific Group | ||
| Timor-Leste | Asia-Pacific Group | ||
| Togo | African Group | ||
| Tonga | Asia-Pacific Group | ||
| Trinidad and Tobago | Latin American and Caribbean States Group | ||
| Tunisia | African Group | ||
| Tuvalu | Asia-Pacific Group | ||
| Uganda | African Group | ||
| Ukraine | Eastern European Group | ||
| United Kingdom of Great Britain and Northern Ireland | Western European and Other States Group | ||
| United Republic of Tanzania | African Group | ||
| Uruguay | Latin American and Caribbean States Group | ||
| Vanuatu | Asia-Pacific Group | ||
| Viet Nam | Asia-Pacific Group | ||
| Yemen | Asia-Pacific Group | ||
| Zambia | African Group | ||
| Zimbabwe | African Group |