International Centre for Settlement of Investment Disputes

149 countries are members.

Country
Afghanistan
Albania
Algeria
Argentina
Armenia
Australia
Austria
Azerbaijan
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Benin
Bosnia and Herzegovina
Botswana
Brunei
Bulgaria
Burkina Faso
Burundi
Cambodia
Cameroon
Canada
Cape Verde
Central African Republic
Chad
Chile
Colombia
Comoros
Costa Rica
Croatia
Cyprus
Czech Republic
Democratic Republic of the Congo
Denmark
Egypt
El Salvador
Estonia
Eswatini
Federated States of Micronesia
Fiji
Finland
France
Gabon
Germany
Ghana
Greece
Grenada
Guatemala
Guinea
Guyana
Haiti
Honduras
Hungary
Iceland
Indonesia
Ireland
Israel
Italy
Ivory Coast
Jamaica
Japan
Jordan
Kazakhstan
Kenya
Kingdom of the Netherlands
Kuwait
Latvia
Lebanon
Lesotho
Liberia
Lithuania
Luxembourg
Madagascar
Malawi
Malaysia
Mali
Malta
Mauritania
Mauritius
Moldova
Mongolia
Montenegro
Morocco
Mozambique
Nepal
New Zealand
Nicaragua
Niger
Nigeria
North Macedonia
Norway
Oman
Pakistan
Panama
Papua New Guinea
Paraguay
People's Republic of China
Peru
Philippines
Portugal
Qatar
Republic of the Congo
Romania
Rwanda
Saint Kitts and Nevis
Saint Lucia
Saint Vincent and the Grenadines
Samoa
San Marino
Saudi Arabia
Senegal
Serbia
Seychelles
Sierra Leone
Singapore
Slovakia
Slovenia
Solomon Islands
Somalia
South Korea
South Sudan
Spain
Sri Lanka
Sudan
Sweden
Switzerland
Syria
São Tomé and Príncipe
Tanzania
The Bahamas
The Gambia
Timor-Leste
Togo
Tonga
Trinidad and Tobago
Tunisia
Turkey
Turkmenistan
Uganda
Ukraine
United Arab Emirates
United Kingdom
United States
Uruguay
Uzbekistan
Yemen
Zambia
Zimbabwe