Organizations

United Nations 193 countries UNESCO 191 countries Interpol 190 countries World Health Organization 190 countries Organisation for the Prohibition of Chemical Weapons 189 countries International Bank for Reconstruction and Development 187 countries Universal Postal Union 186 countries Treaty on the Non-Proliferation of Nuclear Weapons 184 countries International Telecommunication Union 179 countries Multilateral Investment Guarantee Agency 179 countries World Meteorological Organization 179 countries International Finance Corporation 175 countries World Customs Organization 175 countries International Development Association 171 countries World Trade Organization 155 countries International Centre for Settlement of Investment Disputes 149 countries Group on Earth Observations 86 countries International Hydrographic Organization 83 countries Organisation of African, Caribbean and Pacific States 77 countries International Civil Defence Organisation 75 countries African Development Bank 72 countries Asian Development Bank 64 countries Organisation of Islamic Cooperation 56 countries Commonwealth of Nations 55 countries Organization for Security and Co-operation in Europe 55 countries African Continental Free Trade Area 54 countries African Union 54 countries Organisation internationale de la Francophonie 51 countries Nuclear Suppliers Group 47 countries Council of Europe 43 countries United Nations–African Union Hybrid Operation in Darfur 43 countries Australia Group 40 countries Eurocontrol 38 countries Alliance of Small Island States 37 countries Missile Technology Control Regime 35 countries Organization of American States 35 countries International Holocaust Remembrance Alliance 34 countries Agency for the Prohibition of Nuclear Weapons in Latin America and the Caribbean 33 countries Treaty on Open Skies 32 countries Visa Waiver Program 32 countries NATO 30 countries International Energy Agency 28 countries European Union 27 countries Movement Coordination Centre Europe 26 countries Schengen Area 26 countries ASEAN Regional Forum 23 countries AFRISTAT 22 countries Arab League 22 countries Arab Monetary Fund 22 countries Organization for Economic Cooperation and Development 22 countries Arab Fund for Economic and Social Development 21 countries Asia-Pacific Economic Cooperation 20 countries Caribbean Development Bank 20 countries Arab Bank for Economic Development in Africa 18 countries G20 17 countries OHADA 17 countries Antarctic Treaty System 16 countries Economic Community of West African States 16 countries Organization of the Petroleum Exporting Countries 16 countries International Centre for Migration Policy Development 15 countries Southern African Development Community 15 countries Caribbean Community 14 countries Caribbean Disaster Emergency Management Agency 14 countries European Payments Union 14 countries European Southern Observatory 14 countries ASEAN 12 countries Central American Bank for Economic Integration 12 countries Commonwealth of Independent States 12 countries Organization of the Black Sea Economic Cooperation 12 countries Strategic Airlift Capability 12 countries Union of South American Nations 12 countries Council of the Baltic Sea States 11 countries BRICS 10 countries Economic Community of Central African States 10 countries European Economic Area 10 countries European Free Trade Association 10 countries European Space Agency 10 countries Collective Security Treaty Organization 9 countries Commonwealth of Independent States Free Trade Area 9 countries Community of Portuguese Language Countries 9 countries states with nuclear weapons 9 countries Andean Community 8 countries Arctic Council 8 countries COMECON 8 countries Gulf of Guinea Commission 8 countries International Regional Organization for Agricultural Health 8 countries Shanghai Cooperation Organisation 8 countries Bay of Bengal Initiative for Multi-Sectoral Technical and Economic Cooperation 7 countries European Air Transport Command 7 countries Food and Agriculture Organization of the United Nations 7 countries International Civil Aviation Organization 7 countries International Fund for Agricultural Development 7 countries International Monetary Fund 7 countries International Renewable Energy Agency 7 countries Organization of Turkic States 7 countries Southeast Asia Treaty Organization 7 countries World Intellectual Property Organization 7 countries African Groundnut Council 6 countries Bank of Central African States 6 countries Economic and Monetary Community of Central Africa 6 countries International Maritime Organization 6 countries Lake Chad Basin Commission 6 countries Non-Aligned Movement 6 countries Nordic Battle Group 6 countries United Nations Security Council 6 countries ABCANZ Armies 5 countries AUSCANNZUKUS 5 countries Air Force Interoperability Council 5 countries Arab Maghreb Union 5 countries Barents Euro-Arctic Council 5 countries Central American Common Market 5 countries Central Asian Cooperation Organization 5 countries Community of Latin American and Caribbean States 5 countries Conseil de l'Entente 5 countries European Coal and Steel Community 5 countries G7 5 countries GUAM Organization for Democracy and Economic Development 5 countries International Atomic Energy Agency 5 countries International Criminal Court 5 countries Multinational Joint Task Force 5 countries Nordic Council 5 countries Southern African Customs Union 5 countries UN Trade and Development 5 countries Warsaw Pact 5 countries Indian Ocean Commission 4 countries League of Nations 4 countries Mano River Union 4 countries Visegrád Group 4 countries ABC nations 3 countries ANZUK 3 countries ANZUS 3 countries BRIC 3 countries Baltic Assembly 3 countries Bank for International Settlements 3 countries Benelux 3 countries Carbon Neutrality Coalition 3 countries Caribbean Free Trade Association 3 countries Cooperation Council for the Arab States of the Persian Gulf 3 countries Group of 77 3 countries International Olympic Committee 3 countries International Red Cross and Red Crescent Movement 3 countries North American Free Trade Agreement 3 countries Partnership for Peace 3 countries Rio Group 3 countries UN Tourism 3 countries ALBA 2 countries Belgium–Luxembourg Economic Union 2 countries CERN 2 countries Dutch Language Union 2 countries Eastern Partnership 2 countries European Bank for Reconstruction and Development 2 countries European Convention on Human Rights 2 countries G4 nations 2 countries G8 2 countries Global Biodiversity Information Facility 2 countries Intelsat 2 countries Inter-American Development Bank 2 countries International Labour Organization 2 countries International Military Sports Council 2 countries International Organization for Migration 2 countries International Organization for Standardization 2 countries Interparliamentary Union 2 countries Latin American Integration Association 2 countries Latin Union 2 countries Montenegro–Ukraine Free Trade Area 2 countries Permanent Court of Arbitration 2 countries South Asian Association for Regional Cooperation 2 countries Union State 2 countries Union for the Mediterranean 2 countries United Nations Industrial Development Organization 2 countries Western European Union 2 countries World Bank 2 countries Allies of the First World War 1 country Arab Information and Communication Technologies Organization 1 country Asian Infrastructure Investment Bank 1 country Association Trio 1 country Association of Caribbean States 1 country Association of National Olympic Committees 1 country CGIAR 1 country Cairns Group 1 country Caribbean Forum 1 country Central European Free Trade Agreement 1 country Colombo Plan 1 country Combined Communications-Electronics Board 1 country Commission for the Conservation of Southern Bluefin Tuna 1 country Community of Sahel-Saharan States 1 country Conference on Disarmament 1 country Convention on preventing and combating violence against women and domestic violence 1 country Convention on the Rights of Persons with Disabilities 1 country Creative Cities Network 1 country Digital Nations 1 country EFTA Court 1 country East African Community 1 country Eurasian Economic Community 1 country Euro-Atlantic Partnership Council 1 country European Civil Aviation Conference 1 country European Common Aviation Area 1 country European Economic Community 1 country FIFA 1 country Five Eyes 1 country Francophonie 1 country G8+5 1 country General Agreement on Tariffs and Trade 1 country Group of 15 1 country Group of Ten 1 country IBSA Dialogue Forum 1 country Inter-American Tropical Tuna Commission 1 country International Chamber of Commerce 1 country International Coffee Organization 1 country International Commission for the Protection of the Danube River 1 country International Confederation of Free Trade Unions 1 country International Energy Forum 1 country International Lake Constance conference 1 country International Telecommunications Satellite Organization 1 country International Trade Union Confederation 1 country Islamic World Educational, Scientific and Cultural Organization 1 country Latin America 1 country Latin American and the Caribbean Economic System 1 country Lomé Convention 1 country Lublin Triangle 1 country MIKTA 1 country Maghreb 1 country National Aeronautics and Space Administration 1 country Netherlands-Indonesia Union 1 country Office of the United Nations High Commissioner for Refugees 1 country Open Government Partnership 1 country Organisation of African Unity 1 country Organization for Cooperation of Railways 1 country Organization of Ibero-American States 1 country Organization of World Heritage Cities 1 country Pacific Community 1 country Pacific Islands Forum 1 country Paris Charter 1 country Petrocaribe 1 country Pyrenees–Mediterranean Euroregion 1 country South Atlantic Peace and Cooperation Zone 1 country Summit of South American-Arab Countries 1 country The Technical Cooperation Program 1 country United Nations Convention on the Law of the Sea 1 country United Nations Economic Commission for Africa 1 country United Nations Economic Commission for Europe 1 country United Nations Human Rights Council 1 country United Nations Truce Supervision Organization 1 country University of Teacher Education in Special Needs 1 country Western and Central Pacific Fisheries Commission 1 country World Federation of Trade Unions 1 country g7+ 1 country potential enlargement of the European Union 1 country