Member states of the Organisation of Islamic Cooperation
The Organisation of Islamic Cooperation founded in 1969 has 57 members, 56 of which are also member states of the United Nations with 49 countries being Muslim majority countries. Some, especially in West Africa, are – though with large Muslim populations – not necessarily Muslim majority countries. A few countries with significant Muslim populations, such as Russia and Thailand, sit as Observer States. The collective population of OIC member states is over 1.8+ billion as of 2013.