1. Afghanistan
2. Iran
3. Mauritania
4. Pakistan
* At the time of writing (December 2023), there are 3 Islamic Republics. The Islamic Republic Of Afghanistan existed between 2004 and 2021. Iran became an Islamic Republic after the overthrow of the Shah in 1979. Indonesia has the largest Islamic population in the world, but is a republic. Egypt is offically the Arab Republic Of Egypt, while Saudi Arabia, home to 2 of the 3 holiest sites in Islam, is a Kingdom.
Back To Number 4 Index