Blocs and alliances how many each country belongs to
94 countries and territories belong to at least one of these 19 groupings; Russia and the United States belong to the most, 9 each.
Source: Membership: the groupings’ own member listsMembers as of 10 Nov 2026
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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
Summary
The 19 groupings range from defence alliances to trade agreements and forums; membership means different things in each.
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 listsMembers as of 10 Nov 2026
Every grouping
| OECD | 38 | 17% | 62% |
|---|---|---|---|
| NATO | 32 | 12% | 51% |
| European Union | 27 | 5.5% | 18% |
| OPEC+ | 21 | 11% | 7.1% |
| APEC | 21 | 36% | 60% |
| G20 | 19 | 58% | 78% |
| RCEP | 15 | 28% | 27% |
| BRICS | 11 | 48% | 28% |
| OPEC | 11 | 6.3% | 2.4% |
| ASEAN | 11 | 8.5% | 3.6% |
| SCO | 10 | 42% | 23% |
| CIS | 9 | 3% | 2.8% |
| G7 | 7 | 9.6% | 45% |
| CSTO | 6 | 2.4% | 2.6% |
| UN Security Council, permanent members | 5 | 25% | 51% |
| Eurasian Economic Union | 5 | 2.2% | 2.6% |
| Quad | 4 | 24% | 35% |
| AUKUS | 3 | 5.4% | 31% |
| USMCA | 3 | 6.3% | 30% |
G20: 19 countries, plus the European Union and, since 2023, the African Union. G7: 7 countries, with the European Union taking part as a non-enumerated member since 1977. BRICS: 11 members, including Saudi Arabia, which has not confirmed it. The counts and shares are of countries only.
Source: Membership: the groupings’ own member lists; World BankMembers as of 10 Nov 20262025
Every country in at least one grouping
| Russia | 9 | BRICS, G20, OPEC+, SCO, APEC, UN Security Council (permanent), CSTO, Eurasian Economic Union, CIS |
|---|---|---|
| United States | 9 | G7, G20, NATO, OECD, APEC, UN Security Council (permanent), Quad, AUKUS, USMCA |
| Australia | 6 | G20, OECD, APEC, RCEP, Quad, AUKUS |
| Canada | 6 | G7, G20, NATO, OECD, APEC, USMCA |
| China | 6 | BRICS, G20, SCO, APEC, RCEP, UN Security Council (permanent) |
| France | 6 | G7, G20, European Union, NATO, OECD, UN Security Council (permanent) |
| Japan | 6 | G7, G20, OECD, APEC, RCEP, Quad |
| United Kingdom | 6 | G7, G20, NATO, OECD, UN Security Council (permanent), AUKUS |
| Germany | 5 | G7, G20, European Union, NATO, OECD |
| Indonesia | 5 | BRICS, G20, ASEAN, APEC, RCEP |
| Italy | 5 | G7, G20, European Union, NATO, OECD |
| Kazakhstan | 5 | OPEC+, SCO, CSTO, Eurasian Economic Union, CIS |
| Mexico | 5 | G20, OPEC+, OECD, APEC, USMCA |
| Belarus | 4 | SCO, CSTO, Eurasian Economic Union, CIS |
| Brunei | 4 | OPEC+, ASEAN, APEC, RCEP |
| India | 4 | BRICS, G20, SCO, Quad |
| Iran | 4 | BRICS, OPEC, OPEC+, SCO |
| Kyrgyzstan | 4 | SCO, CSTO, Eurasian Economic Union, CIS |
| Malaysia | 4 | OPEC+, ASEAN, APEC, RCEP |
| Saudi Arabia | 4 | BRICS, G20, OPEC, OPEC+ |
| South Korea | 4 | G20, OECD, APEC, RCEP |
| Armenia | 3 | CSTO, Eurasian Economic Union, CIS |
| Belgium | 3 | European Union, NATO, OECD |
| Czechia | 3 | European Union, NATO, OECD |
| Denmark | 3 | European Union, NATO, OECD |
| Estonia | 3 | European Union, NATO, OECD |
| Finland | 3 | European Union, NATO, OECD |
| Greece | 3 | European Union, NATO, OECD |
| Hungary | 3 | European Union, NATO, OECD |
| Latvia | 3 | European Union, NATO, OECD |
| Lithuania | 3 | European Union, NATO, OECD |
| Luxembourg | 3 | European Union, NATO, OECD |
| Netherlands | 3 | European Union, NATO, OECD |
| New Zealand | 3 | OECD, APEC, RCEP |
| Philippines | 3 | ASEAN, APEC, RCEP |
| Poland | 3 | European Union, NATO, OECD |
| Portugal | 3 | European Union, NATO, OECD |
| Singapore | 3 | ASEAN, APEC, RCEP |
| Slovakia | 3 | European Union, NATO, OECD |
| Slovenia | 3 | European Union, NATO, OECD |
| Spain | 3 | European Union, NATO, OECD |
| Sweden | 3 | European Union, NATO, OECD |
| Tajikistan | 3 | SCO, CSTO, CIS |
| Thailand | 3 | ASEAN, APEC, RCEP |
| Türkiye | 3 | G20, NATO, OECD |
| Vietnam | 3 | ASEAN, APEC, RCEP |
| Algeria | 2 | OPEC, OPEC+ |
| Austria | 2 | European Union, OECD |
| Azerbaijan | 2 | OPEC+, CIS |
| Brazil | 2 | BRICS, G20 |
| Bulgaria | 2 | European Union, NATO |
| Cambodia | 2 | ASEAN, RCEP |
| Chile | 2 | OECD, APEC |
| Croatia | 2 | European Union, NATO |
| Equatorial Guinea | 2 | OPEC, OPEC+ |
| Gabon | 2 | OPEC, OPEC+ |
| Iceland | 2 | NATO, OECD |
| Iraq | 2 | OPEC, OPEC+ |
| Ireland | 2 | European Union, OECD |
| Kuwait | 2 | OPEC, OPEC+ |
| Laos | 2 | ASEAN, RCEP |
| Libya | 2 | OPEC, OPEC+ |
| Myanmar | 2 | ASEAN, RCEP |
| Nigeria | 2 | OPEC, OPEC+ |
| Norway | 2 | NATO, OECD |
| Republic of the Congo | 2 | OPEC, OPEC+ |
| Romania | 2 | European Union, NATO |
| South Africa | 2 | BRICS, G20 |
| Uzbekistan | 2 | SCO, CIS |
| Venezuela | 2 | OPEC, OPEC+ |
| Albania | 1 | NATO |
| Argentina | 1 | G20 |
| Bahrain | 1 | OPEC+ |
| Colombia | 1 | OECD |
| Costa Rica | 1 | OECD |
| Cyprus | 1 | European Union |
| Egypt | 1 | BRICS |
| Ethiopia | 1 | BRICS |
| Hong Kong | 1 | APEC |
| Israel | 1 | OECD |
| Malta | 1 | European Union |
| Moldova | 1 | CIS |
| Montenegro | 1 | NATO |
| North Macedonia | 1 | NATO |
| Oman | 1 | OPEC+ |
| Pakistan | 1 | SCO |
| Papua New Guinea | 1 | APEC |
| Peru | 1 | APEC |
| South Sudan | 1 | OPEC+ |
| Sudan | 1 | OPEC+ |
| Switzerland | 1 | OECD |
| Taiwan | 1 | APEC |
| Timor-Leste | 1 | ASEAN |
| United Arab Emirates | 1 | BRICS |