Which city has been OPEC's headquarters since 1965?

Vienna has been OPEC’s headquarters since 1965.

The Organization of the Petroleum Exporting Countries was founded in Baghdad in September 1960, but its permanent administrative home changed during its early years. OPEC initially selected Geneva, Switzerland, as its headquarters. On 1 September 1965, it moved to Vienna, Austria, where it remains based.

The move was influenced by Switzerland’s decision not to extend diplomatic privileges to OPEC. Austria, by contrast, wanted to attract international organizations and offered suitable conditions for the group’s diplomatic and administrative work. Vienna was already becoming an important centre for international institutions.

A common mix-up is to answer Baghdad because that city is central to OPEC’s origin. Baghdad was the founding city, not the long-term headquarters. Riyadh is the capital of Saudi Arabia, one of OPEC’s most influential members, while Geneva hosted OPEC before the move to Vienna.