This article was automatically translated from the original Turkish version.
The Organisation for Economic Co-operation and Development (OECD) is an international body composed of 38 countries committed to democracy and market economies. Its headquarters are in Paris France. The primary objective of the OECD is to promote economic development among its member countries increase employment raise living standards maintain fiscal stability contribute to the economic development of other nations and support growth in global trade.
The predecessor of the OECD was the Organisation for European Economic Co-operation OEEC established in 1947 under the Marshall Plan to distribute aid from the United States and Canada to European countries. This structure was designed to support the reconstruction of Europe after the Second World War. In 1961 the OEEC’s mandate and scope were expanded and the OECD was founded. With this reorganization countries outside Europe joined the organization and the OECD became a global platform for economic cooperation.
The main functions of the OECD can be summarized as follows:
In addition the OECD provides a platform where governments can compare policy experiences seek solutions to common problems identify good practices and develop high standards of economic policy.
The Organisation for Economic Co-operation and Development (OECD) is an international organization with a multilayered structure. Its structure consists of decision-making mechanisms shaped by member states various expert committees the secretariat and affiliated agencies. The fundamental aim of this structure is to provide a functional and coordinated system to promote economic cooperation policy alignment and information sharing.
The Council is the supreme decision-making body of the OECD and is composed of representatives of member states. Each member country has one representative in the Council usually its permanent representative in Paris. The Council also meets periodically at ministerial level. All decisions are made by consensus. The Council’s responsibilities include defining the overall strategic direction approving the budget and evaluating new membership applications.
Approximately 300 committees working groups and expert groups operate under the Council and conduct technical-level work in various economic and social policy areas. These units are composed of experts from member countries and develop policy analysis and recommendations across a broad spectrum including labor trade education environment science and technology.
The OECD Secretariat is the technical and administrative unit responsible for the day-to-day operations of the organization. It is headquartered in Paris. Under the leadership of the Secretary-General the Secretariat conducts research collects data prepares reports and supports the work of the committees. The Secretariat consists of approximately 3500 staff members including experts from various countries.
The Secretary-General is elected by the Council for a five-year term and is responsible for the administrative and representative functions of the OECD. The Secretary-General implements the Council’s decisions and oversees the management of the Secretariat. The Secretary-General also manages the organization’s relations with the public and international engagements.
The OECD structure includes several affiliated agencies such as the International Energy Agency (IEA) and the Nuclear Energy Agency (NEA). These agencies provide technical and institutional support to the OECD’s work in energy policy and nuclear energy.
Through these structures the OECD conducts multilateral policy dialogue information exchange and standard-setting processes among its member countries.
The OECD was established in 1961 and currently has 38 member countries. Member states include countries from Europe North and South America Asia and Oceania. Some countries in order of their accession date are:

Member Countries of the Organisation for Economic Co-operation and Development (Eurostat)
Member countries have equal voting rights in the OECD Council. Decisions are made by consensus and each country has an equal voice in shaping the organization’s policies. The membership application process includes technical assessments policy reviews and approval by existing members.
The process for joining the OECD begins with negotiations opened by the OECD Council and proceeds according to a defined roadmap. Candidate countries are evaluated on their capacity to align with OECD legal frameworks and their policies and practices. This process involves developing and implementing recommendations to enhance compliance with OECD standards and best practices.
The following countries are currently undergoing the accession process:
The accession roadmap includes a comprehensive technical assessment of the candidate country’s legislation and practices in relevant policy areas conducted by OECD committees. At the end of the process concrete recommendations are provided for achieving compliance and their implementation is a fundamental requirement for full membership.
To enhance global economic cooperation the OECD has established “key partner” relationships with several major countries. Key partners participate in OECD’s daily working processes contribute to research join statistical databases and engage in policy discussions within committees. This cooperation aims to strengthen the integration of these countries into OECD standards and policy debates.
The OECD’s key partners include:
These countries maintain close ties with the OECD and play important roles in international policy dialogue.
The OECD is involved in various regional initiatives to promote inclusive and balanced economic development globally. These initiatives aim to strengthen cooperation with non-member countries support reforms and disseminate good governance practices. Through setting common policy priorities building capacity and providing technical assistance these initiatives contribute to the development processes of countries in the respective regions.
The OECD’s regional initiatives cover the following geographic areas:
OECD members are predominantly high-income countries that join the organization based on democratic governance and commitment to market economies. Common characteristics include:
There is no single common currency among OECD member countries. Each member uses its own national currency. However OECD members within the Eurozone such as Germany France and Italy use the euro (EUR) as their common currency. While common economic policies are developed at the OECD level there is no monetary union.
Today the OECD is a global platform effective in evidence-based policy development data collection and analysis economic research and the formulation of reform proposals. Member states are encouraged to cooperate under principles of mutual accountability and transparency. Major economies such as the United States engage under the OECD umbrella in areas such as budget discipline transparency and responsiveness to member priorities.
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Eurostat. "Glossary: Organisation for Economic Co-operation and Development (OECD)." *Eurostat – Statistics Explained*. Accessed January 8, 2026. https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Organisation_for_Economic_Co-operation_and_Development_(OECD)
Ministry of Agriculture and Forestry of the Republic of Turkey, General Directorate of EU and Foreign Relations. “Economic Cooperation and Development Organization (OECD).” Ministry of Agriculture and Forestry of the Republic of Turkey. Accessed July 29, 2025. https://www.tarimorman.gov.tr/ABDGM/Menu/68/Ekonomik-Isbirligi-Ve-Kalkinma-Orgutu-_oecd
Ministry of Foreign Affairs of the Republic of Türkiye. "Economic Cooperation and Development Organization (OECD)." Ministry of Foreign Affairs of the Republic of Türkiye Official Website. Accessed January 8, 2026. https://www.mfa.gov.tr/iktisadi-isbirligi_ve-gelisme-teskilati-_oecd_.tr.mfa
Ministry of Trade of the Republic of Türkiye. "Economic Cooperation and Development Organization (OECD)." *Official Website of the Ministry of Trade of the Republic of Türkiye*. Accessed July 29, 2025. https://ticaret.gov.tr/dis-iliskiler/cok-tarafli-ve-bolgesel-iliskiler/cok-tarafli-iliskiler/iktisadi-isbirligi-ve-kalkinma-teskilati-oecd
OECD (Organisation for Economic Co-operation and Development). “Members and Partners.” OECD. Accessed July 29, 2025. https://www.oecd.org/en/about/members-partners.html
U.S. Department of State. “The Organization for Economic Co-operation and Development (OECD).” U.S. Department of State. Accessed July 29, 2025. https://www.state.gov/the-organization-for-economic-co-operation-and-development-oecd
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History
Objectives and Functions
Structure of the OECD
Council
Committees
Secretariat
Secretary-General’s Office
Affiliated Agencies
Membership and Member Countries
Candidate Countries
Key Partners
Regional Initiatives
Common Characteristics of Member Countries
Common Currency
Role Today