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OPEC Member Reference

All OPEC members with crude oil production and reserves.

Reference table of OPEC member countries with approximate crude oil production in million barrels per day and proven reserves, plus accession year and region.

Which countries are in OPEC?

OPEC's members are Algeria, the Republic of the Congo, Equatorial Guinea, Gabon, Iran, Iraq, Kuwait, Libya, Nigeria, Saudi Arabia, the United Arab Emirates and Venezuela. Membership changes over time as countries join, leave or suspend participation.

The Organization of the Petroleum Exporting Countries

OPEC is an intergovernmental bloc of major oil-exporting countries that coordinates production policy to influence global crude prices. This reference lists each member with the year it joined, its approximate production in million barrels per day, and its proven reserves, with sorting to compare them.

How it works

Each member carries an accession year — 1960 for the five founders who met in Baghdad — plus approximate crude production in million barrels per day (mb/d) and proven reserves in billion barrels. Sorting reorders the table by production or reserves. Figures are approximate and move with quota decisions, new discoveries and market conditions.

Notes and example

  • OPEC was founded in Baghdad in 1960 by Iran, Iraq, Kuwait, Saudi Arabia and Venezuela.
  • Saudi Arabia is the largest producer and the de facto swing producer.
  • Venezuela holds the bloc’s largest proven reserves, though much is heavy crude.
  • Members periodically join, leave or suspend membership, so the roster changes.