Chronology of the Formation of International Organizations
- 1865 – International Telegraph Union.
- 1875 – Universal Postal Union.
- 1919 – International Labour Organization (ILO).
- 1919 – International Chamber of Commerce (ICC).
- 1920 – League of Nations.
- 1930 – Bank for International Settlements (BIS).
- 1945 – United Nations (UN).
- 1945 – International Monetary Fund (IMF).
- 1945 – International Bank for Reconstruction and Development (IBRD).
- 1945 – Food and Agriculture Organization of the UN (FAO).
- 1945 – League of Arab States (LAS).
- 1946 – United Nations Educational, Scientific and Cultural Organization (UNESCO).
- 1947 – International Civil Aviation Organization (ICAO).
- 1947 – International Telecommunication Union (ITU).
- 1948 – General Agreement on Tariffs and Trade (GATT).
- 1948 – Organization for European Economic Cooperation (OEEC).
- 1948 – Organization of American States (OAS).
- 1948 – World Health Organization (WHO).
- 1949 – Council of Europe.
- 1949 – Council for Mutual Economic Assistance (CMEA or COMECON).
- 1951 – Colombo Plan.
- 1951 – European Coal and Steel Community (ECSC).
- 1956 – International Finance Corporation (IFC).
- 1957 – Treaty of Rome: Formation of the European Economic Community (EEC) and Euratom.
- 1957 – International Atomic Energy Agency (IAEA).
- 1958 – International Maritime Organization (IMO).
- 1958 – European Investment Bank (EIB).
- 1958 – European Development Fund (EDF).
- 1959 – Inter-American Development Bank (IDB).
- 1960 – International Development Association (IDA).
- 1960 – European Free Trade Association (EFTA).
- 1960 – Benelux Economic Union.
- 1960 – Organization of the Petroleum Exporting Countries (OPEC).
- 1960 – Central American Bank for Economic Integration (CABEI).
- 1961 – Organization for Economic Cooperation and Development (OECD).
- 1963 – International Bank for Economic Cooperation (IBEC).
- 1963 – Organization of African Unity (OAU).
- 1964 – United Nations Conference on Trade and Development (UNCTAD).
- 1964 – International Trade Centre (ITC) (a joint UNCTAD/WTO initiative).
- 1964 – African Development Bank (AfDB).
- 1966 – Asian Development Bank (ADB).
- 1966 – Central African Customs and Economic Union.
- 1966 – International Centre for Settlement of Investment Disputes (ICSID).
- 1967 – United Nations Industrial Development Organization (UNIDO).
- 1967 – Association of Southeast Asian Nations (ASEAN).
- 1969 – Andean Pact (Andean Community).
- 1970 – World Intellectual Property Organization (WIPO).
- 1970 – International Investment Bank (IIB).
- 1971 – Organization of Islamic Cooperation (OIC).
- 1973 – Caribbean Common Market (CARICOM).
- 1973 – European Monetary Cooperation Fund (EMCF).
- 1973 – Arab Bank for Economic Development in Africa.
- 1973 – West African Development Bank.
- 1975 – World Tourism Organization (WTO).
- 1975 – Latin American Economic System (LAES).
- 1975 – Development Bank of Central African States.
- 1975 – Islamic Development Bank (IsDB).
- 1976 – Economic Community of West African States (ECOWAS).
- 1976 – East African Development Bank.
- 1977 – International Fund for Agricultural Development (IFAD).
- 1977 – Arab Monetary Fund.
- 1977 – Establishment of the European Monetary System (EMS).
- 1982 – Latin American Integration Association (LAIA).
- 1985 – Organization for Economic Cooperation (ECO).
- 1988 – Multilateral Investment Guarantee Agency (MIGA).
- 1989 – Asia-Pacific Economic Cooperation (APEC).
- 1990 – European Bank for Reconstruction and Development (EBRD).
- 1991 – Commonwealth of Independent States (CIS).
- 1992 – Signing of the Treaty on the Formation of the European Union (EU).
- 1992 – Baltic States Council for Cooperation.
- 1992 – Organization of the Black Sea Economic Cooperation (BSEC).
- 1994 – Creation of the European Economic Area (EEA).
- 1994 – North American Free Trade Agreement (NAFTA).
- 1994 – Association of Caribbean States (ACS).
- 1994 – European Monetary Institute (EMI).
- 1994 – Common Market for Eastern and Southern Africa (COMESA).
- 1995 – World Trade Organization (WTO).
- 1995 – Southern Common Market (MERCOSUR).
- 1995 – Middle East Development Bank.
- 1998 – EU member states ratify the Partnership and Cooperation Agreement between the EU and Ukraine.
- 1999 – European Central Bank (ECB).
- 2000 – Eurasian Economic Community (EurAsEC).
- 2003 – Agreement on the Establishment of a Single Economic Space.
- 2004 – Accession of 10 new member states to the EU.
- 2004 – Ukraine–EU Action Plan under the European Neighborhood Policy.