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.
Christianity in Africa
In 2009, the UNO counted 45,000 Roman Catholics and 50,000 to 100,000 Protestants in Algeria. Conversions to Christianity have been most common in Kabylie, especially in the wilaya of Tizi Ouzou. In that wilaya, the proportion of Christians has been estimated to be between 1% and 5%. A 2015 study estimates 380,000 Muslims converted to Christianity in Algeria.