Europe

• European Union (EU)
  • detailed overview of the European Union institutions
• Western European Union (WEU)
  • Assembly of the WEU
  • Western European Armaments Group (WEAG)
  • Institute for Security Studies (ISS)
• Council of Europe (CoE)
  • Parliamentary Assembly
  • Committee of Ministers
  • Congress of Local and Regional Authorities of Europe
  • European Court of Human Rights
  • European Commission of Human Rights
  • European Commission against Racism and Intolerance (ECRI)
  • Directorate of Human Rights
  • Directorate of Youth and Sport
  • European Department for the Quality of Medicines
  • European Committee for the Prevention of Torture and Inhuman or Degrading Treatment or Punishment (CPT)
  • European Audiovisual Observatory
• Organization for Security and Co-operation in Europe (OSCE)
  • Parliamentary Assembly
  • Office for Democratic Institutions and Human Rights (ODIHR)
  • High Commissioner on National Minorities
  • Representative on Freedom of the Media
  • Court on Conciliation and Arbitration
  • Mission to Bosnia and Herzegovina
  • Mission to Croatia
  • Mission in Kosovo
  • Liaison Office in Central Asia
• European Organisation of Supreme Audit Institutions (EUROSAI)
• European Patent Organisation
  • European Patent Office (EPO)
• European Space Agency (ESA)
  • European Space Research Institute (ESRIN)
  • European Space Operations Centre (ESOC)
  • European Space Research and Technology Centre (ESTEC)
  • European Centre for Space Law (ECSL)
  • Villafranca Satellite Tracking Station
  • Publications Division
• European Free Trade Association (EFTA)
• Central European Free Trade Agreement (CEFTA)
• European Bank for Reconstruction and Development (EBRD)
• European Conference of Postal and Telecommunications Administrations (CEPT)
  • European Telecommunications Office (ETO)
  • European Radiocommunications Office (ERO)
• European Organisation for the Safety of Air Navigation (EUROCONTROL)
• European Cooperation in the Field of Scientific and Technical Research (COST)
• EUREKA
• European Conference of Ministers of Transport (ECMT)
• European Centre for Medium-Range Weather Forecasts (ECMWF)
• European Broadcasting Union (EBU)
• European Initiative for Agricultural Research for Development (EIARD)
• European Southern Observatory (ESO)
• European Laboratory for Particle Physics (CERN)
• European Molecular Biology Laboratory (EMBL)
• European Fusion Development Agreement (EFDA)
• Nordic Council / Nordic Council of Ministers
  • Nordic Information Office in Tallinn, Estonia
  • Nordic Information Office in Riga, Latvia
  • Nordic Information Office in Vilnius, Lithuania
  • Nordic Information Office in St. Petersburg, Russian Federation
• Vestnordisk Råd
• North Atlantic Marine Mammal Commission (NAMMCO)
• Baltic Council
  • Baltic Council of Ministers
  • Baltic Assembly
• Council of the Baltic Sea States (CBSS)
• Baltic Sea States Subregional Co-operation (BSSSC)
• Benelux Trademarks Office
• Assembly of European Regions
• Alpine Convention
  • System for Observation of and Information on the Alps (SOIA)
• Arbeitsgemeinschaft Alpenländer
• Working Community Alps-Adriatic
• Communauté de Travail des Alpes Occidentales (COTRAO)

Africa

• Organization of African Unity (OAU)
• African Development Bank
• Southern African Development Community (SADC)
  • Energy Sector Technical and Administrative Unit
  • Food, Agriculture and Natural Resources Development Unit
  • Forestry Sector Technical Co-ordination Unit (FSTCU)
  • Human Resources Development Sector Co-ordinating Unit
  • Mining Sector Co-ordinating Unit
  • Water Sector Co-ordination Unit (WSCU)
  • Southern African Center for Cooperation in Agricultural and Natural Resources Research and Training (SACCAR)
  • Committee of Central Bank Governors
  • Electoral Commissions Forum
• Common Market for Eastern and Southern Africa (COMESA)
• Communauté Économique des États de l'Afrique de l'Ouest (CEDEAO) / Economic Community of West African States (ECOWAS)
• Union Economique et Monétaire Ouest Africaine (UEMOA)
  • Banque Centrale des États de l'Afrique de l'Ouest (BCEAO)
  • Banque Ouest Africaine de Développement (BOAD)
• Secretariat for Eastern African Coastal Area Management (SEACAM)
• Agence pour la Sécurité de la Navigation Aérienne en Afrique et à Madagascar (ASECNA)
• Indian Ocean Commission (IOC)
• West Africa Rice Development Association (WARDA)

America

• Organization of American States (OAS)
  • Inter-American Defense Board (IADB)
  • Pan American Health Organization (PAHO / OPS)
    • Representación de la OPS en Argentina
    • Representación de la OPS en Bolivia
    • Representação no Brasil
    • Representación de la OPS en Costa Rica
    • Representación de la OPS en Ecuador
    • Representación de la OPS en El Salvador
    • Representación de la OPS en Guatemala
    • Representación de la OPS en Honduras
    • Representación de la OPS en Nicaragua
    • Representación de la OPS en Peru
    • Office of Caribbean Program Coordination
  • Inter-American Institute for Cooperation on Agriculture (IICA)
    • Agencia de Cooperación Técnica
  • Pan American Institute of Geography and History (PAIGH)
• Inter-American Development Bank (IABD)
• Asociación Latinoamericana de Integración (ALADI) [Association of Latin American Integration]
• Parlamento Latinoamericano (PARLATINO) [Latinamerican Parliament]
• Sistema Económico Latinoamericano (SELA) [Latinamerican Economic System]
• Organización Latinoamericana y del Caribe de Entidades Fiscalizadoras Superiores (OLACEFS)
• Organización Latinoamericana de Energía (OLADE) [Latinamerican Organization of Energy]
• Centro Latinoamericano de Administración para el Desarrollo (CLAD)
• Mercado Común del Cono Sur (MERCOSUR)
• Comunidad Andina [Andean Community]
  • Parlamento Andino [Andes Parliament]
  • Tribunal de Justicia de la Comunidad Andina [Court of Justice of the Andes Community]
  • Corporación Andina de Fomento (CAF)
• North American Free Trade Agreement (NAFTA)
  • North American Agreement on Environmental Cooperation (NAAEC)
    • Commission for Environmental Cooperation (CEC)
  • North American Agreement on Labor Cooperation (NAALC)
  • North American Plant Protection Organization (NAPPO)
  • North American Development Bank (NADBank)
  • Border Environment Cooperation Commission (BECC)
• Sistema de la Integración Centroamericana (SICA) [Centralamerican Integration System]
  • Parlamento Centroamericano (PARLACEN) [Centralamerican Parliament]
  • Secretaría de Integración Económica Centroamericana (SIECA) [Secretariat of the Centralamerican Economic Integration]
    • Consejo Monetario Centroamericano (CMCA) [Centralamerican Monetary Council]
    • Banco Centroamericano de Integración Económica (BCIE) [Centralamerican Bank for Economic Integration]
    • Instituto Centroamericano de Investigación y Tecnología (ICAITI) [Centralamerican Institute of Research and Technology]
  • Corte Centroamericana de Justicia (CCJ) [Centralamerican Court of Justice]
  • Instituto de Nutrición de Centro América y Panamá (INCAP) [Institute of Nutrition of Central America and Panama]
  • Comision Técnica Regional de Telecomunicaciones de Centro América (COMTELCA)
• Caribbean Community (CARICOM)
  • Caribbean Disaster Emergency Response Agency (CDERA)
  • Caribbean Environment Health Institute (CEHI)
  • Caribbean Meteorological Institute (CMI)
  • Caribbean Development Bank (CDB)
  • CARICOM Fisheries Resource Management Program (CFRAMP)
• Association of Caribbean States (ACS)
• Organisation of Eastern Caribbean States (OECS)
  • Eastern Caribbean Central Bank (ECCB)
  • Eastern Caribbean Investment Promotion Service (ECIPS)
  • Natural Resources Management Unit (NRMU)
  • Export Development and Agricultural Diversification Unit (EDADU)
  • OECS Education Reform Unit (OERU)
  • Embassies of the Eastern Caribbean States and Missions to the European Communities in Brussels
  • High Commission for the Organisation of Eastern Caribbean States in Ottawa, Canada
• Caribbean Customs Law Enforcement Council (CCLEC)
• Caribbean Export Development Agency
• Caribbean Examinations Council (CXC)
• Comisión Centroamericana de Ambiente y Desarrollo (CCAD)
• Centro Agronómico Tropical de Investigación y Enseñanza (CATIE) [Tropical Agricultural Research and Higher Education Center]
• Parlamento Amazónico [Amazonian Parliament]
• Comisión Permanente del Pacífico Sur (CPPS)
• Comité Intergubernamental de la Hidrovía (CIH) [Intergovernmental Committee for the Hidrovia]
• Free Trade Area of the Americas (FTAA)
• International Boundary and Water Commission (IBWC)
• International Joint Commission (IJC)

Asia

• Association of Southeast Asian Nations (ASEAN)
  • Committee on Culture and Information (COCI)
    • COCI Brunei
    • COCI Indonesia
    • COCI Laos
    • COCI Malaysia
    • COCI Myanmar
    • COCI Philippines
    • COCI Singapore
    • COCI Thailand
    • COCI Vietnam
  • ASEAN Centre in Japan
• South Asian Association for Regional Cooperation (SAARC)
• Asian Development Bank
• Asian Organization of Supreme Audit Institutions (ASOSAI)
• Centre on Integrated Rural Development for Asia and the Pacific (CIRDAP)
• Asian Productivity Organization (APO)
• Southeast Asian Ministers of Education Organization (SEAMEO)
• Southeast Asian Fisheries Development Center (SEAFDEC)

Oceania

• Pacific Islands Forum
  • Forum Fisheries Agency (FFA)
  • South Pacific Trade Commission (SPTC) in Sydney
  • South Pacific Trade Commission (SPTC) in Auckland
  • Pacific Islands Centre (PIC) in Tokyo
• Pacific Community
• Tourism Council of the South Pacific (TCSP)
• South Pacific Applied Geoscience Commission (SOPAC)
• South Pacific Association of Supreme Audit Institutions (SPASAI)
• Australasian Council of Auditors-General (ACAG)
• Pacific Islands Development Program (PIDP)
• South Pacific Regional Environment Programme (SPREP)
• Association of Pacific Island Legislatures (APIL)
• Australia New Zealand Food Authority (ANZFA)
• Australia New Zealand Land Information Council (ANZLIC)
• Australian and New Zealand Minerals and Energy Council (ANZMEC)
• Agriculture and Resource Management Council of Australia and New Zealand (ARMCANZ)

More than one continent

• United Nations (UN)
  • detailed overwiew of the United Nations system
• Organisation for Economic Co-operation and Development (OECD)
  • OECD Washington Center
  • International Energy Agency (IEA)
  • Nuclear Energy Agency (NEA)
  • Developement Assistance Committee (DAC)
• North Atlantic Treaty Organisation (NATO)
  • Parliamentary Assembly
  • Consultation, Command and Control Agency
• African, Caribbean and Pacific Group of States (ACP Group)
• Commonwealth of Independent States (CIS)
  • Interstate Statistical Committee
• Non Aligned Movement (NAM)
• Asia-Pacific Economic Cooperation (APEC)
  • Asia Pacific Parliamentary Forum (APPF)
  • Asia-Pacific Legal Metrology Forum (APLMF)
• Asia-Pacific Telecommunity (APT)
• Organization of the Petroleum Exporting Countries (OPEC)
• Inter-Parliamentary Union (IPU)
• International Organization of Supreme Audit Institutions (INTOSAI)
• International Criminal Police Organization (ICPO / INTERPOL)
• International Cocoa Organization (ICCO)
• International Coffee Organization (ICO)
• International Grains Council (IGC)
• International Tropical Timber Organisation (ITTO)
• Asian and Pacific Coconut Community (APCC)
• International Organization of Legal Metrology (OIML)
• International Hydrographic Organization (IHO)
• Office international des Épizooties (OIE)
• International Council for the Exploration of the Sea (ICES)
• International Organization for Migration (IOM)
• The Commonwealth
  • Commonwealth Parliamentary Association (CPA)
  • Commonwealth Telecommunications Organisation (CTO)
  • Commonwealth Science Council (CSC)
  • Commonwealth Broadcasting Association (CBA)
• Union Latine
• Organisation Internationale de la Francophonie (OIF)
  • Assemblée Parlementaire de la Francophonie (APF)
    • APF Région Amérique
  • Agence Intergouvernementale de la Francophonie
    • Institut de l'Énergie et de l'Environnement de la Francophonie (IEPF)
    • Institut Francophone des Nouvelles Technologies de l'Information et de la Formation (INTIF)
    • Centre International Francophone de Documentation et d'Information (CIFDI)
  • Agence Universitaire de la Francophonie (AUF)
  • TV5 - la Télévision Internationale Francophone
• Organización de Estados Iberoamericanos para la Educación, la Ciencia y la Cultura (OEI)
• Comunidade Países Língua Portuguesa (CPLP)
• Organization of the Islamic Conference (OIC)
  • Permanent Observer Mission to the United Nations
  • Islamic Development Bank (IBD)
    • Islamic Corporation for the Insurance of Investment and Export Credit (ICIEC)
  • Islamic Research and Training Institute (IRTI)
  • Islamic Centre for Development of Trade (ICDT)
  • Statistical, Economic and Social Research and Training Centre for Islamic Countries (SESRTCIC)
• Middle East & North Africa Economic Summit (MENA)
  • Bank for Economic Cooperation and Development in the Middle East and North Africa (MENABANK)
• CAB International (CABI)
• Ramsar Convention on Wetlands
• Black Sea Economic Cooperation (BSEC)
• GUUAM Group
• International Center for Scientific and Technical Information (ICSTI)
• Joint Institute for Nuclear Research (JINR)
• Alliance of Small Island States (AOSIS)
• Arctic Council