Countries with more than 5% Muslims in the total population. Sunnis are shown in shades of green, Shiites in shades of red. Shiites may be under-represented, because they do not always show up in statistics. The same applies to other Islamic movements.

Sunni Islam (Arabic: أهل السنة) is the largest branch of Islam. They are the branch of Islam that came through the Rashidun Empire, which started with Abu Bakr and ended by Ali ibn Abi Talib. Sunni beliefs are based on the Quran and the Kutub al-Sittah. Sunnis make up around 90% of the world's Muslim population. With approximately 1.8 billion followers, it is the largest religious denomination of any religion in the world.Catholicism is the second-largest. There are four sub-groups (Madh'hab)s within Sunni Islam; Malikis, Hanafis, Hanbalis and Shafi'is.