G20 began in 1999 with 19 countries, plus the European Union. In 2026 it had 19 countries, plus the European Union and, since 2023, the African Union. Membership changed in 2 years, including the 1999 founding.
Source: The groupings’ own member lists and histories, 10 Nov 2026·1999–2026
Finance ministers and central bank governors met as the G20 before leaders held the first G20 summit in 2008. The African Union became a member in 2023.
Map. Arrow keys move the map, plus and minus zoom, N and P step through the countries with data, Enter opens the one shown, Escape clears the selection.
Borders show who controls an area in practice, as drawn by Natural Earth. Disputed borders are dashed. Borders shown do not imply endorsement. How we treat borders
Timeline
Every year in which a country joined or left G20, with notes on other changes.
1999
Argentina, Australia, Brazil, Canada, China, Germany, France, United Kingdom, Indonesia, India, Italy, Japan, South Korea, Mexico, Russia, Saudi Arabia, Türkiye, United States and South Africa
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19
Finance ministers and central bank governors first met as the G20.
2008
–
–
19
Leaders held the first G20 summit.
2023
–
–
19
The African Union became a member; it is not a country, so it is not on the map.
Source: The groupings’ own member lists and histories, 10 Nov 2026·1999–2026
Every country that has been a member
Years of membership; a dash after a year means it is still a member. Countries are drawn on today’s borders. Years are those of accession or exit as the grouping records them; a year is not the exact date.