Shia Islam
Updated: 1/1/1970, 12:00:00 AM Wikipedia source
Shia Islam is the second-largest branch of Islam. It holds that Muhammad designated Ali ibn Abi Talib (r. 656–661) as both his political successor (caliph) and as the spiritual leader of the Muslim community (imam). However, his right is understood to have been usurped by a number of Muhammad's companions at the meeting of Saqifa, during which they appointed Abu Bakr (r. 632–634) as caliph instead. As such, Sunni Muslims believe Abu Bakr, Umar (r. 634–644), Uthman (r. 644–656) and Ali to be 'rightly-guided caliphs', whereas Shia Muslims regard only Ali as the legitimate successor. Shia Muslims believe that the imamate continued through Ali's sons, Hasan and Husayn, after which various Shia branches developed and recognized different imams. They revere the ahl al-bayt, the family of Muhammad, maintaining that they possess divine knowledge. Shia holy sites include the shrine of Ali in Najaf, the shrine of Husayn in Karbala, and other mausoleums of the ahl al-bayt. Later events, such as Husayn's martyrdom in the Battle of Karbala (680 CE), further influenced the development of Shia Islam, contributing to the formation of a distinct religious sect with its own rituals and shared collective memory. Shia Islam is followed by 10–15% of all Muslims, numbering at an estimated 200–300 million followers worldwide as of 2025. The three main Shia branches are Twelverism, Isma'ilism, and Zaydism. Shia Muslims form a majority of the population in Iran, Iraq, and Azerbaijan, as well as about half of the citizen population of Bahrain. Significant Shia communities are also found in Lebanon, Kuwait, Turkey, Yemen, Saudi Arabia, Afghanistan and the Indian subcontinent. Iran stands as the world's only country where Shia Islam forms the foundation of both its laws and governance system.
Tables
| Country | Article | Shia population in 2009 (Pew) | Percent of population that is Shia in 2009 (Pew) | Percent of global Shia population in 2009 (Pew) | Population estimate ranges and notes |
| Iran | Islam in Iran | 66,000,000–69,500,000 | 90–95 | 37–40 | |
| Pakistan | Shia Islam in the Indian subcontinent | 25,272,000 | 15 | 15 | A 2023 census estimate was that Shia made up about 15-20% of Pakistan's population. |
| Iraq | Shi'a Islam in Iraq | 19,000,000–24,000,000 | 55–65 | 10–11 | |
| India | Shia Islam in the Indian subcontinent | 12,300,000–18,500,000 | 1.3–2 | 9–14 | |
| Yemen | Shia Islam in Yemen | 7,000,000–8,000,000 | 35–40 | ~5 | Majority following Zaydi Shia sect. |
| Turkey | Shi'a Islam in Turkey | 6,000,000–9,000,000 | ~10–15 | ~3–4 | Majority following Alevi Shia sect. |
| Azerbaijan | Islam in Azerbaijan | 4,575,000–5,590,000 | 45–55 | 2–3 | Azerbaijan is majority Shia. A 2012 work noted that in Azerbaijan, among believers of all faiths, 10% identified as Sunni, 30% identified as Shia, and the remainder of followers of Islam simply identified as Muslim. |
| Afghanistan | Shi'a Islam in Afghanistan | 3,000,000 | 15 | ~2 | A reliable census has not been taken in Afghanistan in decades, but about 20% of Afghan population is Shia, mostly among ethnic Tajik and Hazara minorities. |
| Syria | Islam in Syria | 2,400,000 | 13 | ~2 | Majority following Alawites Shia sect. |
| Lebanon | Shi'a Islam in Lebanon | 2,100,000 | 31.2 | <1 | In 2020, the CIA World Factbook stated that Shia Muslims constitute 31.2% of Lebanon's population. |
| Saudi Arabia | Shi'a Islam in Saudi Arabia | 2,000,000 | ~6 | ||
| Nigeria | Shi'a Islam in Nigeria | <2,000,000 | <1 | <1 | Estimates range from as low as 2% of Nigeria's Muslim population to as high as 17% of Nigeria's Muslim population. Some, but not all, Nigerian Shia are affiliated with the banned Islamic Movement in Nigeria, an Iranian-inspired Shia organization led by Ibrahim Zakzaky. |
| Tanzania | Islam in Tanzania | ~1,500,000 | ~2.5 | <1 | |
| Kuwait | Shi'a Islam in Kuwait | 500,000–700,000 | 20–25 | <1 | Among Kuwait's estimated 1.4 million citizens, about 30% are Shia (including Ismaili and Ahmadi, whom the Kuwaiti government count as Shia). Among Kuwait's large expatriate community of 3.3 million noncitizens, about 64% are Muslim, and among expatriate Muslims, about 5% are Shia. |
| Bahrain | Islam in Bahrain | 400,000–500,000 | 65–70 | <1 | |
| Tajikistan | Shi'a Islam in Tajikistan | ~400,000 | ~4 | <1 | Shi'a Muslims in Tajikistan are predominantly Nizari Ismaili |
| Germany | Islam in Germany | ~400,000 | ~0.5 | <1 | |
| United Arab Emirates | Islam in the United Arab Emirates | ~300,000 | ~3 | <1 | |
| United States | Islam in the United StatesShia Islam in the Americas | ~225,000 | ~0.07 | <1 | Shi'a form a majority amongst Arab Muslims in many American cities, e.g. Lebanese Shi'a forming the majority in Detroit. |
| United Kingdom | Islam in the United Kingdom | ~125,000 | ~0.2 | <1 | |
| Qatar | Islam in Qatar | ~100,000 | ~3.5 | <1 | |
| Oman | Islam in Oman | ~100,000 | ~2 | <1 | As of 2015, about 5% of Omanis are Shia (compared to about 50% Ibadi and 45% Sunni). |
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