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.
History of Algeria
Since 4000 BC, the indigenous peoples of northern Africa successfully resisted Phoenician, Roman, Vandal, Byzantine, Turkish, and French invaders but accepted Islam between the 7th to 9th century, and Arabic is now the language spoken by a majority in the country.