Established: By evolutionary process and formalized December 31, 1931, in the Statute of Westminster.
Purpose: To give expression to a continuing sense of affinity and to foster cooperation among states presently or formerly owing allegiance to the British Crown.
Commonwealth Center: The Secretariat is located in Marlborough House, London, which also serves as the site of Commonwealth meetings in the United Kingdom.
Principal Organs: Meeting of Heads of Government, Secretariat, Commonwealth Ministerial Action Group.
Head of the Commonwealth: Queen Elizabeth II.
Secretary-General: Patricia Scotland (United Kingdom).
Membership (53, with years of entry): Antigua and Barbuda (1981), Australia (1931), Bahamas (1973), Bangladesh (1972), Barbados (1966), Belize (1981), Botswana (1966), Brunei (1984), Cameroon (1995), Canada (1931), Cyprus (1961), Dominica (1978), eSwatini (formerly Swaziland, 1968), Fiji (1970, reentered 1997), Gambia (1995, reentered 2018), ...
- African Union (AU)
- Arab League
- Asia-Pacific Economic Cooperation (APEC)
- Association of Southeast Asian Nations (ASEAN)
- Caribbean Community and Common Market (CARICOM)
- Common Market For Eastern and Southern Africa (COMESA)
- Commonwealth of Independent States (CIS)
- Council of Europe
- Economic Community of West African States (ECOWAS)
- European Atomic Energy Community (EURATOM)
- European Free Trade Association (EFTA)
- European Union (EU)
- Group of Eight
- Group of Twenty
- International Criminal Court (ICC)
- International Energy Agency (IEA)
- International Organization For Migration (IOM)
- Non-Aligned Movement
- North Atlantic Treaty Organization (NATO)
- Organization For Economic Cooperation and Development (OECD)
- Organization For Security And Cooperation In Europe (OSCE)
- Organization of American States (OAS)
- Organization of Eastern Caribbean States (OECS)
- Organization of Islamic Cooperation (OIC)
- Organization of The Petroleum Exporting Countries (OPEC)
- Pacific Islands Forum (PIF)
- Regional Development Banks
- Shanghai Cooperation Organization (SCO)
- South Asian Association For Regional Cooperation (SAARC)
- Southern African Development Community (SADC)
- Southern Cone Common Market (Mercosur/Mercosul)
- The Commonwealth
- United Nations (UN)
- United Nations: Related Organizations
- United Nations: Specialized Agencies
- World Trade Organization (WTO)