OPEC 11 members
OPEC has 11 members; together, today’s OPEC members had 6.3% of the world’s people and 2.4% 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 Organization of the Petroleum Exporting Countries: oil producers that coordinate their output, founded in 1960.
Today’s OPEC members account for 6.3% of the world’s people (2025), 2.4% of the world’s GDP (2025), 4.7% of the world’s military spending (2025; 9 of 11 members have figures) and 6.4% of the world’s CO2 emissions (2024). Of its members, 11 are also in OPEC+, 2 in BRICS, 1 in the G20 and 1 in the SCO.
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
| Nigeria | 238 m | 46% | $291 bn | OPEC+ |
|---|---|---|---|---|
| Iran | 92 m | 18% | $363 bn | BRICS, OPEC+, SCO |
| Algeria | 47 m | 9.2% | $287 bn | OPEC+ |
| Iraq | 47 m | 9.2% | $254 bn | OPEC+ |
| Saudi Arabia | 37 m | 7.2% | $1.28 tn | BRICS, G20, OPEC+ |
| Venezuela | 29 m | 5.6% | $100 bn | OPEC+ |
| Libya | 7.5 m | 1.5% | $48 bn | OPEC+ |
| Republic of the Congo | 6.5 m | 1.3% | $16 bn | OPEC+ |
| Kuwait | 4.9 m | 0.9% | $157 bn | OPEC+ |
| Gabon | 2.6 m | 0.5% | $21 bn | OPEC+ |
| Equatorial Guinea | 1.9 m | 0.4% | $13 bn | OPEC+ |
Source: Membership: the groupings’ own member lists; World BankMembers as of 10 Nov 20262025