There are no generally accepted classifications of currents in Islam. Pew Research Center reports divide Muslims into Sunnis (87-90% of all Muslims in 2009) and Shiites (10-13%). At the same time, the authors of the studies admit that there are other groups in Islam, as well as the general Islamic trend of Sufism. The World Christian Encyclopedia (WCE) divides Islam into the following 3 streams:

Sunnis (84.4% of all Muslims). According to the source, over half of Sunnis (53%) adhere to the Hanafi right-wing school; supporters of the Shafi’i and Maliki madhhabs make up 24% and 22%, respectively. The smallest madhhab, the Hanbalis, have 2.3 million followers. Among the Sunnis, the source separately singles out the representatives of sectarian Sunniism – Wahhabis (7 million).

Shiites (14.3% Muslims). The prevailing trend in Shiite Islam is the isnaasharit (over 80%, the figure includes both the usulis and akhbarites). The Nizaris and Mustalis together represent the second largest movement in the Shiite branch of Islam – Ismailism (14% of all Shiites). The Zeidis (together with the Nuktavites) unite almost 5% of all Shiites. The rest of the Shiite movements (Alawites, Sheikhites, Ahl-e Hakk, Bektashi, etc.) are extremely small in number.

Islamic schismatics (1.3% Muslims). This group includes various unrelated Islamic sects. The largest among the organizations represented in this group is Ahmadi (8 million in 2000). Black Muslims (Nation of Islam, Moorish Science Temple, Five Percent, United Nation of Islam, American Muslim Society) had 1.65 million followers in 2000. The encyclopedia includes two more categories in the group of Islamic schismatics: Kharijites (1.64 million, all of them Ibadis) and Druze (834 thousand).

On no continent are Muslims in the majority. The largest share of Muslims is in Africa (40.5% or 334 million) and Asia (26% or 913 million). The share of Muslims in Europe is 5.6% (39 million; together with the Asian part of Russia), in North America and Oceania – 1.6% each (5.7 million and 422 thousand, respectively), in Latin America only 0.3 % (1.65 million).