This is a list of international organizations based in Istanbul, Turkey.
List Organization Acronym Official website Notes Developing 8 D-8 developing8.org General Secretariat Islamic Conference Youth Forum for Dialogue and Cooperation ICYF-DC icyf-dc.org An affiliated institution of the OIC. Organization of the Black Sea Economic Cooperation BSEC bsec-organization.org Permanent International Secretariat of the Organization of the Black Sea Economic Cooperation (BSEC PERMIS) Organization of Turkic States OTS turkkon.org General Secretariat Research Centre for Islamic History, Art and Culture IRCICA ircica.org A subsidiary organization of the OIC. Standards and Metrology Institute for Islamic Countries SMIIC smiic.org An affiliated institution of the OIC. Support for Sustainable Communities SSC Non Profit Organization