answers.input_text: short
answers.span_text: 14
questions: how many countries are a part of opec
name: OPEC
contexts: Organization of the Petroleum Exporting Countries ( OPEC ) Flag Headquarters Vienna , Austria Official language English Type International cartel Membership 14 states ( May 2017 ) ( show ) Algeria Angola Ecuador Equatorial Guinea Gabon Iran * Iraq * Kuwait * Libya Nigeria Qatar Saudi Arabia * United Arab Emirates Venezuela * * founding member Leaders Secretary General Mohammed Barkindo Establishment Baghdad , Iraq Statute September 1960 In effect January 1961 Currency Indexed as USD per barrel ( US $ / bbl ) Website OPEC.org