Religions of the world’s countries

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Religion — the cradle of science, art and culture

Long before universities and academies, temples and monasteries kept, enlarged and passed on knowledge. That is why religion has its own section on our site, before science and culture. A few facts:

  • Ancient Egypt. Temples had “Houses of Life” — scribal workshops where texts on medicine, astronomy and ritual were copied and kept.
  • Mesopotamia. The earliest cuneiform records (Uruk, about 3200 BC) are accounts of temple households; Babylonian priest-astronomers recorded the movements of the heavens for centuries.
  • India. The Buddhist monastery of Nalanda became one of the largest centres of learning of the ancient world; its ruins are a UNESCO World Heritage Site.
  • Middle Ages. Monasteries copied and preserved the books of antiquity; the University of Paris grew out of the cathedral school of Notre-Dame. Al-Qarawiyyin in Fez, founded in 859 together with a mosque, is named by Guinness World Records as the oldest higher-learning institution still operating.
  • Armenia. The monk Mesrop Mashtots created the Armenian alphabet (405); the first book translated into Armenian was the Bible. In the 13th–15th centuries the monastic universities of Gladzor and Tatev were at work.
  • Genetics and cosmology. In 1856–1863 the monk Gregor Mendel crossed peas in the garden of his monastery in Brno, and in 1866 he described the laws of heredity — the beginning of genetics. Canon Nicolaus Copernicus set out the motion of the Earth around the Sun (1543); the priest Georges Lemaître derived the expansion of the universe in 1927.
  • Art. The theatre of ancient Greece grew out of festivals in honour of Dionysus; the staff notation still used today is credited to the monk Guido d’Arezzo (11th century); the priest Komitas collected several thousand Armenian folk songs and laid the foundation of a national Armenian style in music.

Today science and religion are different paths to knowledge, but they share a history, and it is part of every people’s culture.

Sources: A. H. Gardiner, “The House of Life” (1938); Encyclopaedia Britannica — cuneiform, Universities of Paris, Mesrop Mashtots, Mendel’s “Experiments with Plant Hybrids”, Copernicus, Lemaître, Guido d’Arezzo, Komitas; UNESCO — Nalanda Mahavihara; Guinness World Records.

Official websites of religious organisations: 13 religions and their branches, 103 organisations from 43 countries. Religions and branches are listed by the number of believers, from largest to smallest (figures and sources are at the bottom of the page). In each branch, world centres and international organisations come first (in bold), followed by organisations by country. Only the organisations’ own websites, without judgement.

Religions: Christianity · Islam · Hinduism · Buddhism · Traditional beliefs · Sikhism · Taoism and Confucianism · Judaism · Bahá’í Faith · Jainism · Shinto · Yazidism · Zoroastrianism

Click the country next to a name to see only that country’s organisations.

Christianity about 2.5 billion

Catholic Church

Protestantism and Anglicanism

Orthodox Churches

Oriental Orthodox Churches

Armenian Apostolic Church

Other Oriental Orthodox Churches

New Christian churches

Islam about 1.9 billion

Sunni Islam

Shia Islam

Hinduism about 1.1 billion

Buddhism about 530 million

Mahayana

Theravada

Vajrayana

Traditional beliefs about 290 million

Sikhism about 29 million

Taoism and Confucianism about 17.5 million

Judaism about 15 million

Bahá’í Faith about 9 million

Jainism about 6 million

Shinto about 2.8 million

Yazidism 0.3 to 1 million

No verified official websites here yet — the list is growing.

Zoroastrianism about 0.2 million

Numbers of believers are 2020 estimates from the World Religion Database (Boston University), as tabulated by Encyclopaedia Britannica; Yazidis — Pew Research Center estimate (2014). Pew Research Center (2025) gives the largest religions in the same order. Chinese folk religion (about 458 million) is not shown separately: it has no common organisations with official websites. Branches follow the same principle: Christianity — World Christian Database (2026), Islam — Pew Research Center (2009), Buddhism — Pew Research Center (2012). The Armenian Apostolic Church comes first among the Oriental Orthodox churches by editorial decision.

We list only the organisations’ own official websites and do not judge any teaching; the order follows the number of believers and implies no preference. Links checked on October 24, 2026. Spotted a mistake or know an official website that is missing? Write to us on WhatsApp.