Member states and partner countries of the OECD

Currently 38 states are members of this organization; Austria was a founding member. Most recently, Costa Rica became the fifth Latin American country to join the organization in May 2021.
The following states are full members:
- Australia,
- Austria,
- Belgium,
- Canada,
- Chile,
- Czech Republic,
- Denmark,
- Estonia,
- Finland,
- France,
- Germany,
- Greece,
- Hungary,
- Iceland,
- Ireland,
- Israel,
- Italy,
- Japan,
- Korea,
- Luxembourg,
- Mexico,
- Netherlands,
- New Zealand,
- Norway,
- Poland,
- Portugal,
- Slovak Republic,
- Slovenia,
- Spain,
- Sweden,
- Switzerland,
- Türkiye,
- United Kingdom of Great Britain),
- United States of America (USA),
- Latvia,
- Lithuania and Colombia,
- Costa Rica.
The Russian Federation is not a full member, but works as an associate country in numerous OECD groups and projects.
An additional 5 states are so-called partner countries:
- Brazil,
- China,
- India,
- Indonesia and
- South Africa.
The European Union also takes part in the deliberations (without voting rights).