Algeria
Islam is the predominant religion in Algeria, with its adherents, mostly Sunnis, accounting for 99% of the population according to a 2012 CIA World Factbook estimate, and 97.9% according to Pew Research in 2010. There are about 150,000 Ibadis in the M'zab Valley in the region of Ghardaia.
Demographics of Algeria
There were an estimated 10,000 Christians in Algeria in 2008. In a 2009 study the UNO estimated there were 45,000 Catholics and 50,000–100,000 Protestants in Algeria. A 2015 study estimates 380,000 Muslims converted to Christianity in Algeria.