OECD 38 members
OECD has 38 members; together, today’s OECD members had 17% of the world’s people and 62% of its GDP in 2025.
Source: Membership: the groupings’ own member listsMembers as of 10 Nov 2026
Source: World Bank Indicators2025
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Summary
The Organisation for Economic Co-operation and Development: an organisation of mostly high-income countries, founded in 1961.
Today’s OECD members account for 17% of the world’s people (2025), 62% of the world’s GDP (2025), 64% of the world’s military spending (2025) and 30% of the world’s CO2 emissions (2024). Together they mine 53% of the world’s lithium, 21% of the world’s rare earths and 11% of the world’s palladium (USGS, 2025, estimated). Of its members, 26 are also in NATO, 22 in the European Union, 11 in the G20 and 8 in APEC.
Membership is as each grouping lists it. A grouping’s share of the world adds up its members’ figures, against the sum for every country with a figure.
Source: Membership: the groupings’ own member lists; World Bank; Global Carbon Budget; FAOSTAT; USGSMembers as of 10 Nov 2026
Members
| United States | 342 m | 24% | $30.77 tn | G7, G20, NATO, APEC, UN Security Council (permanent), Quad, AUKUS, USMCA |
|---|---|---|---|---|
| Mexico | 132 m | 9.4% | $1.83 tn | G20, OPEC+, APEC, USMCA |
| Japan | 123 m | 8.8% | $4.44 tn | G7, G20, APEC, RCEP, Quad |
| Türkiye | 86 m | 6.1% | $1.60 tn | G20, NATO |
| Germany | 83 m | 6% | $5.05 tn | G7, G20, European Union, NATO |
| United Kingdom | 69 m | 5% | $4.00 tn | G7, G20, NATO, UN Security Council (permanent), AUKUS |
| France | 69 m | 4.9% | $3.37 tn | G7, G20, European Union, NATO, UN Security Council (permanent) |
| Italy | 59 m | 4.2% | $2.55 tn | G7, G20, European Union, NATO |
| Colombia | 53 m | 3.8% | $457 bn | – |
| South Korea | 52 m | 3.7% | $1.87 tn | G20, APEC, RCEP |
| Spain | 49 m | 3.5% | $1.91 tn | European Union, NATO |
| Canada | 42 m | 3% | $2.32 tn | G7, G20, NATO, APEC, USMCA |
| Poland | 36 m | 2.6% | $1.04 tn | European Union, NATO |
| Australia | 28 m | 2% | $1.80 tn | G20, APEC, RCEP, Quad, AUKUS |
| Chile | 20 m | 1.4% | $357 bn | APEC |
| Netherlands | 18 m | 1.3% | $1.33 tn | European Union, NATO |
| Belgium | 12 m | 0.9% | $725 bn | European Union, NATO |
| Czechia | 11 m | 0.8% | $391 bn | European Union, NATO |
| Portugal | 11 m | 0.8% | $347 bn | European Union, NATO |
| Sweden | 11 m | 0.8% | $669 bn | European Union, NATO |
| Greece | 10 m | 0.7% | $281 bn | European Union, NATO |
| Israel | 10 m | 0.7% | $611 bn | – |
| Hungary | 9.5 m | 0.7% | $246 bn | European Union, NATO |
| Austria | 9.2 m | 0.7% | $579 bn | European Union |
| Switzerland | 9.1 m | 0.6% | $1.04 tn | – |
| Denmark | 6.0 m | 0.4% | $463 bn | European Union, NATO |
| Finland | 5.6 m | 0.4% | $317 bn | European Union, NATO |
| Norway | 5.6 m | 0.4% | $531 bn | NATO |
| Ireland | 5.5 m | 0.4% | $722 bn | European Union |
| Slovakia | 5.4 m | 0.4% | $155 bn | European Union, NATO |
| New Zealand | 5.3 m | 0.4% | $264 bn | APEC, RCEP |
| Costa Rica | 5.2 m | 0.4% | $103 bn | – |
| Lithuania | 2.9 m | 0.2% | $95 bn | European Union, NATO |
| Slovenia | 2.1 m | 0.2% | $80 bn | European Union, NATO |
| Latvia | 1.8 m | 0.1% | $49 bn | European Union, NATO |
| Estonia | 1.4 m | 0.1% | $47 bn | European Union, NATO |
| Luxembourg | 686,970 | <0.1% | $101 bn | European Union, NATO |
| Iceland | 392,404 | <0.1% | $39 bn | NATO |
Source: Membership: the groupings’ own member lists; World BankMembers as of 10 Nov 20262025