G-20, a Group of Twenty Countries was established in 1999, to bring together systemically important industrialized and developing economies to discuss key issues in the global economy. "G-20" is made up of the finance ministers and central bank governors of 19 countries:

1. Argentina
2. Australia
3. Brazil
4. Canada
5. China
6. France
7. Germany
8. India
9. Indonesia
10. Italy
11. Japan
12. Mexico
13. Russia
14. Saudi Arabia
15. South Africa
16. Republic of Korea
17. Turkey
18. United Kingdom
19. United States of America

The European Union, who is represented by the rotating Council presidency and the European Central Bank, is the 20th member of the G-20.
 1. Argentina 2. Australia 3. Brazil 4. Canada 5. China 6. France 7. Germany 8. India 9. Indonesia 10. Italy 11. Japan 12. Mexico 13. Russia 14. Saudi Arabia 15. South Africa 16. Republic of Korea 17. Turkey 18. United Kingdom 19. United States of America
 The European Union, who is represented by the rotating Council presidency and the European Central Bank, is the 20th member of the G-20.