MEAs to which Countries are Members (current names: e.g., Czechia, Eswatini, North Macedonia)

Greenland
Niue
Abkhazia
Grenada
North Macedonia
Afghanistan
Guam
Norway
Agreement
Guatemala
Norway (pre-1905)
Albania
Guinea
Oman
Algeria
Guinea-Bissau
Organisation of Eastern Caribbean States
Andorra
Guyana
Pacific Islands, Trust Territory
Angola
Haiti
Pakistan
Antigua and Barbuda
Holy See
Palau
Argentina
Honduras
Palestine, Occupied Territories
Armenia
Hong Kong
Panama
Aruba
Hungary
Papua New Guinea
Australia
Iceland
Paraguay
Austria
Iceland (pre-1944)
Peru
Austria-Hungary
India
Philippines
Azerbaijan
India (pre-1947)
Poland
Bahamas
Indochina
Poland (Danzig)
Bahrain
Indonesia
Portugal
Bangladesh
IO-African Intellectual Property Organization
Prussia
Barbados
IO-Birdlife International
Qatar
Belarus
IO-Comprehensive Nuclear-Test-Ban Treaty Organisation
Qatar (pre-1971)
Belarus (Soviet period)
IO-EUMETSAT
Romania
Belgium
IO-European Atomic Energy Community
Russia (pre-1917)
Belgium (Brussels)
IO-European Bank for Reconstruction and Development (EBRD)
Russian Federation
Belgium (Flemish)
IO-European Space Agency
Rwanda
Belgium (Walloon)
IO-Eutelsat
Sahrawi Arab Democratic Republic
Belize
IO-IAEA
Saint Helena
Benin
IO-International Bank for Reconstruction and Development
Saint Kitts and Nevis
Bermuda
IO-International Epizootic Bureau
Saint Kitts and Nevis (pre-1983)
Bhutan
IO-IUCN/SSC
Saint Lucia
Bolivia
IO-Nordic Environment Finance Corporation (NEFCO)
Saint Martin
Bophutatswana
IO-UN Food and Agriculture Organization
Saint Vincent and the Grenadines
Bosnia and Herzegovina
IO-UNEP/CMS Secretariat
Samoa
Botswana
IO-World Health Organization
San Marino
Brazil
IO-World Meteorological Organization
Sao Tome and Principe
British Virgin Islands
Iran
Saudi Arabia
Brunei Darussalam
Iraq
Saudi Arabia (pre-1927)
Bulgaria
Iraq (pre-1932)
Senegal
Burkina Faso
Ireland
Serbia
Burundi
Israel
Serbia (pre-1992)
Cambodia
Italy
Seychelles
Cambodia (pre-1953)
Jamaica
Sierra Leone
Cameroon
Japan
Singapore
Canada
Jordan
Slovakia
Cape Verde
Kazakhstan
Slovenia
Central African Republic
Kenya
Solomon Islands
Central African Republic (pre-1960)
Kenya (pre-1963)
Somalia
Chad
Kiribati
South Africa
Chad (pre-1960)
Korea, Democratic People's Republic
South Ossetia
Chile
Korea, Republic of
South Sudan
China
Kosovo
Spain
Ciskei
Kuwait
Sri Lanka
Colombia
Kyrgyzstan
Sudan
Comoros
Laos
Sudan (pre-1956)
Congo, Democratic Republic of
Latvia
Suriname
Congo, Democratic Republic of (pre-1960)
Latvia (pre-1940)
Suriname (pre-1975)
Congo, Republic of the
Lebanon
Sweden
Congo, Republic of the (pre-1960)
Lesotho
Sweden (pre-1905)
Cook Islands
Liberia
Switzerland
Costa Rica
Libya
Syria
Cote d'Ivoire
Liechtenstein
Syria (pre-1961)
Croatia
Lithuania
Taiwan
Croatia (pre-1991)
Lithuania (pre-1940)
Tajikistan
Cuba
Luxembourg
Tanzania
Curacao
Macao
Thailand
Cyprus
Madagascar
Timor-Leste
Czechia
Malawi
Togo
Denmark
Malaysia
Tokelau
Djibouti
Maldives
Tonga
Dominica
Mali
Transkei
Dominican Republic
Malta
Trinidad and Tobago
Ecuador
Marshall Islands
Tunisia
Egypt
Marshall Islands (pre-1986)
Tunisia (pre-1956)
El Salvador
Mauritania
Turkey
Equatorial Guinea
Mauritania (pre-1960)
Turkey (pre-1923)
Eritrea
Mauritius
Turkmenistan
Estonia
Mexico
Turks and Caicos Islands
Estonia (pre-1940)
Micronesia
Tuvalu
Estonia (Soviet period)
Micronesia (pre-1986)
Uganda
Eswatini
Moldova
Uganda (pre-1962)
Ethiopia
Monaco
Ukraine
European Union
Mongolia
Ukraine (Soviet period)
Faeroe Islands
Montenegro
United Arab Emirates
Falkland Islands (Malvinas)
Montserrat
United Kingdom
Fiji
Morocco
United States
Finland
Morocco (pre-1956)
Uruguay
France
Mozambique
Uzbekistan
Gabon
Mozambique (pre-1975)
Vanuatu
Gabon (pre-1960)
Myanmar
Venda
Gambia
Myanmar (pre-1948)
Venezuela
Georgia
Namibia
Viet Nam
Germany
Namibia (pre-1990)
Viet Nam (pre-1954)
Germany (Alsace-Lorraine)
Nauru
Vietnam, South
Germany (Baden)
Nepal
Yemen
Germany (Baden-Wurttemberg)
Netherlands
Yemen (pre-1962)
Germany (Bavaria)
Netherlands Antilles
Yemen, Arab Republic
Germany (Hesse)
New Caledonia
Yemen, Democratic
Germany (pre-1949)
New Zealand
Yugoslavia
Germany (Wurttemberg)
Nicaragua
Yugoslavia (1918-1943)
Germany, Former GDR
Niger
Zambia
Ghana
Niger (pre-1960)
Zimbabwe
Greece
Nigeria
Zimbabwe (pre-1965)