The table above is compiled from the relevant Wikipedia pages listing Religions by Country.
The numbers of adherents to organised religions in the world is difficult to accurately ascertain. Therefore figures and estimates are included from multiple sources to show the reader the problem in compiling such statistics.
| Religion |
Adherents |
ChristianityChristianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...
|
2.1 billion |
IslamIslam . The most common are and . : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...
|
1.5 billion |
Nonreligious/agnostic/atheism Atheism is, in a broad sense, the rejection of belief in the existence of deities. In a narrower sense, atheism is specifically the position that there are no deities...
|
1.1 billion |
HinduismHinduism is the predominant and indigenous religious tradition of the Indian Subcontinent. Hinduism is known to its followers as , amongst many other expressions...
|
900 million |
| Chinese traditional religion |
394 million |
BuddhismBuddhism is a religion and philosophy encompassing a variety of traditions, beliefs and practices, largely based on teachings attributed to Siddhartha Gautama, commonly known as the Buddha . The Buddha lived and taught in the northeastern Indian subcontinent some time between the 6th and 4th...
|
376 million |
| Animist religions Animism refers to the belief that non-human entities are spiritual beings, or at least embody some kind of life-principle....
|
300 million |
| African traditional The traditional religions indigenous to Africa have, for most of their existence, been orally rather than scripturally transmitted. They are generally associated with animism. Most have ethno-based creations stories... /diasporicAfro-American religions are a number of related religions that developed in the Americas among African slaves and their descendants in various countries of Latin America, the Caribbean, and parts of the southern United States... religions |
100 million |
SikhismSikhism is a monotheistic religion founded during the 15th century in the Punjab region, by Guru Nanak Dev and continued to progress with ten successive Sikh Gurus . It is the fifth-largest organized religion in the world and one of the fastest-growing...
|
23 million |
| Juche Juche or Chuch'e is a Korean word usually translated as "self-reliance." In the Democratic People's Republic of Korea , "Juche" refers specifically to a political thesis of Kim Il-sung, the Juche Idea, that identifies the Korean masses as the masters of the country's development...
|
19 million |
SpiritismSpiritism is a loose corpus of religious faiths having in common the general belief in the survival of a spirit after death. In a stricter sense, it is the religion, beliefs and practices of the people affiliated to the International Spiritist Union, based on the works of Allan Kardec and others...
|
15 million |
JudaismJudaism ) is the "religion, philosophy, and way of life" of the Jewish people...
|
14 million |
Baha'iThe Bahá'í Faith is a monotheistic religion founded by Bahá'u'lláh in 19th-century Persia, emphasizing the spiritual unity of all humankind. There are an estimated five to six million Bahá'ís around the world in more than 200 countries and territories....
|
7 million |
JainismJainism is an Indian religion that prescribes a path of non-violence towards all living beings. Its philosophy and practice emphasize the necessity of self-effort to move the soul towards divine consciousness and liberation. Any soul that has conquered its own inner enemies and achieved the state...
|
4.2 million |
Shintoor Shintoism, also kami-no-michi, is the indigenous spirituality of Japan and the Japanese people. It is a set of practices, to be carried out diligently, to establish a connection between present day Japan and its ancient past. Shinto practices were first recorded and codified in the written...
|
4 million |
| Cao Dai Cao Đài is a syncretistic, monotheistic religion, officially established in the city of Tay Ninh, southern Vietnam, in 1926. Đạo Cao Đài is the religion's shortened name, the full name is Đại Đạo Tam Kỳ Phổ Độ...
|
4 million |
ZoroastrianismZoroastrianism is a religion and philosophy based on the teachings of prophet Zoroaster and was formerly among the world's largest religions. It was probably founded some time before the 6th century BCE in Greater Iran.In Zoroastrianism, the Creator Ahura Mazda is all good, and no evil...
|
2.6 million |
TenrikyoTenrikyo is a monotheistic religion originating in revelations to a 19th-century Japanese woman named Nakayama Miki, known as Oyasama by followers...
|
2 million |
| Neo-Paganism |
1 million |
Unitarian UniversalismUnitarian Universalism is a religion characterized by support for a "free and responsible search for truth and meaning". Unitarian Universalists do not share a creed; rather, they are unified by their shared search for spiritual growth and by the understanding that an individual's theology is a...
|
800,000 |
| Rastafari Movement The Rastafari movement or Rasta is a new religious movement that arose in the 1930s in Jamaica, which at the time was a country with a predominantly Christian culture where 98% of the people were the black descendants of slaves. Its adherents worship Haile Selassie I, Emperor of Ethiopia , as God...
|
600,000 |
| Religion |
Population |
Religious text |
Type |
Holiest place |
Founded |
Afterlife |
ChristianityChristianity is a monotheistic religion based on the life and teachings of Jesus as presented in canonical gospels and other New Testament writings...
|
2 billion |
Bible The Bible refers to any one of the collections of the primary religious texts of Judaism and Christianity. There is no common version of the Bible, as the individual books , their contents and their order vary among denominations...
|
Abrahamic |
Jerusalem/RomeRome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half... (Catholicism only) |
LevantThe Levant or ) is the geographic region and culture zone of the "eastern Mediterranean littoral between Anatolia and Egypt" . The Levant includes most of modern Lebanon, Syria, Jordan, Israel, the Palestinian territories, and sometimes parts of Turkey and Iraq, and corresponds roughly to the... , 1st century AD |
Eternal hellIn many religious traditions, a hell is a place of suffering and punishment in the afterlife. Religions with a linear divine history often depict hells as endless. Religions with a cyclic history often depict a hell as an intermediary period between incarnations... , heavenHeaven, the Heavens or Seven Heavens, is a common religious cosmological or metaphysical term for the physical or transcendent place from which heavenly beings originate, are enthroned or inhabit... and temporal purgatoryPurgatory is the condition or process of purification or temporary punishment in which, it is believed, the souls of those who die in a state of grace are made ready for Heaven... (Catholicism only) |
IslamIslam . The most common are and . : Arabic pronunciation varies regionally. The first vowel ranges from ~~. The second vowel ranges from ~~~...
|
1.5 billion |
Quran |
Abrahamic |
MeccaMecca is a city in the Hijaz and the capital of Makkah province in Saudi Arabia. The city is located inland from Jeddah in a narrow valley at a height of above sea level...
|
MeccaMecca is a city in the Hijaz and the capital of Makkah province in Saudi Arabia. The city is located inland from Jeddah in a narrow valley at a height of above sea level... around 610 |
Eternal heavenHeaven, the Heavens or Seven Heavens, is a common religious cosmological or metaphysical term for the physical or transcendent place from which heavenly beings originate, are enthroned or inhabit... , hellIn many religious traditions, a hell is a place of suffering and punishment in the afterlife. Religions with a linear divine history often depict hells as endless. Religions with a cyclic history often depict a hell as an intermediary period between incarnations...
|
AtheismAtheism is, in a broad sense, the rejection of belief in the existence of deities. In a narrower sense, atheism is specifically the position that there are no deities...
|
1.1 billion |
none |
N/A |
none |
N/A |
N/A |
HinduismHinduism is the predominant and indigenous religious tradition of the Indian Subcontinent. Hinduism is known to its followers as , amongst many other expressions...
|
900 million |
VedasThe Vedas are a large body of texts originating in ancient India. Composed in Vedic Sanskrit, the texts constitute the oldest layer of Sanskrit literature and the oldest scriptures of Hinduism....
|
Indian religions |
Varanasi-Etymology:The name Varanasi has its origin possibly from the names of the two rivers Varuna and Assi, for the old city lies in the north shores of the Ganga bounded by its two tributaries, the Varuna and the Asi, with the Ganges being to its south... , Mathura, Ayodhya |
Around 5000–3200 BCE, IndiaIndia , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
|
ReincarnationReincarnation best describes the concept where the soul or spirit, after the death of the body, is believed to return to live in a new human body, or, in some traditions, either as a human being, animal or plant... until mokshaWithin Indian religions, moksha or mukti , literally "release" , is the liberation from samsara and the concomitant suffering involved in being subject to the cycle of repeated death and reincarnation or rebirth.-Origins:It is highly probable that the concept of moksha was first developed in...
|
Chinese folk religionChinese folk religion or Shenism , which is a term of considerable debate, are labels used to describe the collection of ethnic religious traditions which have been a main belief system in China and among Han Chinese ethnic groups for most of the civilization's history until today...
|
394 million |
|
Taoic |
|
|
|
BuddhismBuddhism is a religion and philosophy encompassing a variety of traditions, beliefs and practices, largely based on teachings attributed to Siddhartha Gautama, commonly known as the Buddha . The Buddha lived and taught in the northeastern Indian subcontinent some time between the 6th and 4th...
|
360 million |
Tripiṭaka ' is a traditional term used by various Buddhist sects to describe their various canons of scriptures. As the name suggests, a traditionally contains three "baskets" of teachings: a , a and an .-The three categories:Tripitaka is the three main categories of texts that make up the...
|
Indian religions |
Bodh Gaya, |
5th century BCE, IndiaIndia , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
|
ReincarnationReincarnation best describes the concept where the soul or spirit, after the death of the body, is believed to return to live in a new human body, or, in some traditions, either as a human being, animal or plant... until nirvanaNirvāṇa ; ) is a central concept in Indian religions. In sramanic thought, it is the state of being free from suffering. In Hindu philosophy, it is the union with the Supreme being through moksha...
|
SikhismSikhism is a monotheistic religion founded during the 15th century in the Punjab region, by Guru Nanak Dev and continued to progress with ten successive Sikh Gurus . It is the fifth-largest organized religion in the world and one of the fastest-growing...
|
23 million |
Guru Granth SahibSri Guru Granth Sahib , or Adi Granth, is the religious text of Sikhism. It is the final and eternal guru of the Sikhs. It is a voluminous text of 1430 angs, compiled and composed during the period of Sikh gurus, from 1469 to 1708...
|
Indian religions |
AmritsarAmritsar is a city in the northern part of India and is the administrative headquarters of Amritsar district in the state of Punjab, India. The 2001 Indian census reported the population of the city to be over 1,500,000, with that of the entire district numbering 3,695,077... , |
Around 1490, PunjabThe Punjab , also spelled Panjab |water]]s"), is a geographical region straddling the border between Pakistan and India which includes Punjab province in Pakistan and the states of the Punjab, Haryana, Himachal Pradesh, Chandigarh and some northern parts of the National Capital Territory of Delhi... , North IndiaNorth India, known natively as Uttar Bhārat or Shumālī Hindustān , is a loosely defined region in the northern part of India. The exact meaning of the term varies by usage...
|
ReincarnationReincarnation best describes the concept where the soul or spirit, after the death of the body, is believed to return to live in a new human body, or, in some traditions, either as a human being, animal or plant... until union with WaheguruWaheguru is a term most often used in Sikhism to refer to God, the Supreme Being or the creator of all. It means "The Good/Best Teacher" in the Punjabi language. Wahi means "good" and "Guru" is a term denoting "teacher".... or God. |
TaoismTaoism refers to a philosophical or religious tradition in which the basic concept is to establish harmony with the Tao , which is the mechanism of everything that exists...
|
20 million |
Tao Te ChingThe Tao Te Ching, Dao De Jing, or Daodejing , also simply referred to as the Laozi, whose authorship has been attributed to Laozi, is a Chinese classic text...
|
Taoic |
|
Around 500 BCE, China |
|
JudaismJudaism ) is the "religion, philosophy, and way of life" of the Jewish people...
|
14 million |
Tanakh The Tanakh is a name used in Judaism for the canon of the Hebrew Bible. The Tanakh is also known as the Masoretic Text or the Miqra. The name is an acronym formed from the initial Hebrew letters of the Masoretic Text's three traditional subdivisions: The Torah , Nevi'im and Ketuvim —hence...
|
Abrahamic |
Jerusalem |
Around 1500 BCE |
Symbolic HeavenHeaven, the Heavens or Seven Heavens, is a common religious cosmological or metaphysical term for the physical or transcendent place from which heavenly beings originate, are enthroned or inhabit... and GehennaGehenna , Gehinnom and Yiddish Gehinnam, are terms derived from a place outside ancient Jerusalem known in the Hebrew Bible as the Valley of the Son of Hinnom ; one of the two principal valleys surrounding the Old City.In the Hebrew Bible, the site was initially where apostate Israelites and...
|
SpiritismSpiritism is a loose corpus of religious faiths having in common the general belief in the survival of a spirit after death. In a stricter sense, it is the religion, beliefs and practices of the people affiliated to the International Spiritist Union, based on the works of Allan Kardec and others...
|
11 million |
none |
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
|
1850s |
|
Falun GongFalun Gong is a spiritual discipline first introduced in China in 1992 by its founder, Li Hongzhi, through public lectures. It combines the practice of meditation and slow-moving qigong exercises with the moral philosophy...
|
10 million |
Zhuan Falun, writings by Master Li |
Taoic |
|
1992, China |
Not addressed |
| Bahá'í |
5-7 million |
Aqdas |
Abrahamic |
AcreAcre , is a city in the Western Galilee region of northern Israel at the northern extremity of Haifa Bay. Acre is one of the oldest continuously inhabited sites in the country....
|
IranIran , officially the Islamic Republic of Iran , is a country in Southern and Western Asia. The name "Iran" has been in use natively since the Sassanian era and came into use internationally in 1935, before which the country was known to the Western world as Persia... , in 1844 |
Symbolic heavenHeaven, the Heavens or Seven Heavens, is a common religious cosmological or metaphysical term for the physical or transcendent place from which heavenly beings originate, are enthroned or inhabit... and hellIn many religious traditions, a hell is a place of suffering and punishment in the afterlife. Religions with a linear divine history often depict hells as endless. Religions with a cyclic history often depict a hell as an intermediary period between incarnations...
|
| Cao Dai Cao Đài is a syncretistic, monotheistic religion, officially established in the city of Tay Ninh, southern Vietnam, in 1926. Đạo Cao Đài is the religion's shortened name, the full name is Đại Đạo Tam Kỳ Phổ Độ...
|
4-6 million |
Caodai canon |
Taoic |
Tay NinhTây Ninh is a town in southwestern Vietnam. It is the capital of Tay Ninh province, which encompasses the town and much of the surrounding farmland....
|
VietnamVietnam – sometimes spelled Viet Nam , officially the Socialist Republic of Vietnam – is the easternmost country on the Indochina Peninsula in Southeast Asia. It is bordered by China to the north, Laos to the northwest, Cambodia to the southwest, and the South China Sea –...
|
|
| Confucianism Confucianism is a Chinese ethical and philosophical system developed from the teachings of the Chinese philosopher Confucius . Confucianism originated as an "ethical-sociopolitical teaching" during the Spring and Autumn Period, but later developed metaphysical and cosmological elements in the Han...
|
4-6 million |
Analects |
Taoic |
QufuQufu is a city in southwestern Shandong province, People's Republic of China. It is located at 35° 36′ northern latitude and 117° 02′ east, about south of the provincial capital Jinan and northeast of the prefecture seat at Jining...
|
ChinaChinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture... 551–478 BC |
Not addressed |
| New Age The New Age movement is a Western spiritual movement that developed in the second half of the 20th century. Its central precepts have been described as "drawing on both Eastern and Western spiritual and metaphysical traditions and then infusing them with influences from self-help and motivational...
|
5 million |
N/A |
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
none |
19th century |
karma Karma in Indian religions is the concept of "action" or "deed", understood as that which causes the entire cycle of cause and effect originating in ancient India and treated in Hindu, Jain, Buddhist and Sikh philosophies....
|
JainismJainism is an Indian religion that prescribes a path of non-violence towards all living beings. Its philosophy and practice emphasize the necessity of self-effort to move the soul towards divine consciousness and liberation. Any soul that has conquered its own inner enemies and achieved the state...
|
4.2 million |
Puran Puran Puran Tehsil is a sub-division and tehsil of Shangla District in Khyber-Pakhtunkhwa province of Pakistan....
|
Indian religions |
Sammet Shikharji |
Pre-historic to 5th century BCE, IndiaIndia , officially the Republic of India , is a country in South Asia. It is the seventh-largest country by geographical area, the second-most populous country with over 1.2 billion people, and the most populous democracy in the world...
|
Reincarnation until liberation |
Shintoor Shintoism, also kami-no-michi, is the indigenous spirituality of Japan and the Japanese people. It is a set of practices, to be carried out diligently, to establish a connection between present day Japan and its ancient past. Shinto practices were first recorded and codified in the written...
|
3-4 million |
Kojiki is the oldest extant chronicle in Japan, dating from the early 8th century and composed by Ō no Yasumaro at the request of Empress Gemmei. The Kojiki is a collection of myths concerning the origin of the four home islands of Japan, and the Kami... etc. |
Taoic |
Ise, Mie, formerly called Ujiyamada , is a city located in eastern Mie Prefecture, on the island of Honshū, Japan.Ise is home to Ise Grand Shrine, the most sacred Shintō Shrine in Japan, and is thus a very popular destination for tourists. The city has a long-standing nickname—Shinto —that roughly means...
|
N/A |
varies |
| Wicca Wicca , is a modern Pagan religious movement. Developing in England in the first half of the 20th century, Wicca was popularised in the 1950s and early 1960s by a Wiccan High Priest named Gerald Gardner, who at the time called it the "witch cult" and "witchcraft," and its adherents "the Wica."...
|
1-3 million |
none |
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
none |
1920s |
varies |
| Aladura Aladura is a religion founded c.1922–1930 in West Nigeria by various people, with around 1 million adherents worldwide."Aladura" means "Praying People" in Yoruba....
|
1 million |
none |
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
Lagos |
NigeriaNigeria , officially the Federal Republic of Nigeria, is a federal constitutional republic comprising 36 states and its Federal Capital Territory, Abuja. The country is located in West Africa and shares land borders with the Republic of Benin in the west, Chad and Cameroon in the east, and Niger in... in 1918 |
varies |
| Rastafari |
1 million |
Kebra Nagast The Kebra Nagast , or the Book of the Glory of Kings, is an account written in Ge'ez of the origins of the Solomonic line of the Emperors of Ethiopia. The text, in its existing form, is at least seven hundred years old, and is considered by many Ethiopian Christians and Rastafarians to be an...
|
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
Ethiopia |
JamaicaJamaica is an island nation of the Greater Antilles, in length, up to in width and 10,990 square kilometres in area. It is situated in the Caribbean Sea, about south of Cuba, and west of Hispaniola, the island harbouring the nation-states Haiti and the Dominican Republic... in 1920s |
immortality Immortality is the ability to live forever. It is unknown whether human physical immortality is an achievable condition. Biological forms have inherent limitations which may or may not be able to be overcome through medical interventions or engineering...
|
Unitarian UniversalismUnitarian Universalism is a religion characterized by support for a "free and responsible search for truth and meaning". Unitarian Universalists do not share a creed; rather, they are unified by their shared search for spiritual growth and by the understanding that an individual's theology is a...
|
800,000 |
varies |
New religious movement A new religious movement is a religious community or ethical, spiritual, or philosophical group of modern origin, which has a peripheral place within the dominant religious culture. NRMs may be novel in origin or they may be part of a wider religion, such as Christianity, Hinduism or Buddhism, in...
|
none |
United StatesThe United States of America is a federal constitutional republic comprising fifty states and a federal district... in 1961 |
varies |
DeismDeism in religious philosophy is the belief that reason and observation of the natural world, without the need for organized religion, can determine that the universe is the product of an all-powerful creator. According to deists, the creator does not intervene in human affairs or suspend the...
|
Unknown |
none |
N/A |
none |
Ancient historyAncient history is the study of the written past from the beginning of recorded human history to the Early Middle Ages. The span of recorded history is roughly 5,000 years, with Cuneiform script, the oldest discovered form of coherent writing, from the protoliterate period around the 30th century BC...
|
not addressed |
Remarks: Although Islam is the state religion of most Middle Eastern countries,this list excludes
where 100% of national citizens are Muslims, because there is a substantial number of non-Muslim residents there (mostly
and Jewish minorities). So the total Muslim population in Saudi Arabia is around 25 million (20 million native Saudi citizens with 1.5 million
ns) or only about 90% of the total population. Some other Persian Gulf countries such as
Remarks: "Triple religion" (or "Chinese-Mahayana Buddhism" or "Far East Asian Buddhism") is the mixture of Mahayana Buddhism, with
. Because officially Communist governments that often forcibly suppressed religious expressions still rule a number of traditionally Buddhist countries, and because Buddhists often practice other traditional East Asian religions, the figures could be much higher in these regions.
in Far East Asian countries has a very wide meaning. That is why in such countries as China, Japan, Vietnam, North and South Korea, Taiwan, Hong Kong, and Singapore, the three religions of Buddhism, Taoism and Confucianism are often all considered at once. This is referred to as a "Triple religion", with
in the right. In some regions, such as Japan, belief systems vary with differing emphasis on Shintoism, as well as Ancestor Worship. As such, the Buddhist population is difficult to gauge exactly, but is often nominal. The lesser percentage given is a number of Buddhists who have taken the formal step of
. And the wider percentage given are informal/nominal adherents of combined Buddhism with its related religions. See
All of the below come from the U.S Department of State 2009 International Religious Freedom Report,
based on the highest estimate of people identified as indigenous or followers of indigenous religions that have been well-defined. Due to the syncretic nature of these religions, the following numbers may not reflect the actual number of practitioners.
Sources: Year 2000 Estimated Baha'i statistics from: David Barrett, World Christian Encyclopedia, 2000; Total population statistics, mid-2000 from Population Reference Bureau
Countries with the greatest proportion of people without religion (including Agnostics and Atheists) from
Remarks: Ranked by mean estimate which is in brackets. High irreligious estimates for China and North Korea are very likely highly exaggerated.
The Sikh homeland is the Punjab state, in India, where today Sikhs make up approximately 59% of the population. This is the only place where Sikhs are in the majority. Sikhs have emigrated to countries all over the world - especially to English-speaking and East Asian nations. In doing so they have retained, to an unusually high degree, their distinctive cultural and religious identity.
Sikhs are not ubiquitous worldwide in the way that adherents of larger world religions are, and they remain primarily an ethnic religion. But they can be found in many international cities and have become an especially strong religious presence in the United Kingdom and Canada.
As a spiritual practice, Taoism has made fewer inroads in the West than Buddhism and Hinduism. Despite the popularity of its great classics the I Ching and the Tao Te Ching, the specific practices of Taoism have not been promulgated in America with much success; these religions are not ubiquitous worldwide in the way that adherents of larger world religions are, and they remain primarily an ethnic religion. Nonetheless, Taoist ideas and symbols such as Taijitu have become popular throughout the world through Tai Chi Chuan, Qigong, and various martial arts.
The Chinese traditional religion has 184,000 believers in Latin America, 250,000 believers in Europe, and 839,000 believers in North America .
The Deseret Morning News LDS Church Almanac gives information on historical membership records of The Church of Jesus Christ of Latter-day Saints. The Church's reported membership was roughly 13,824,000 at the start of 2010. (go to Church of Jesus Christ of Latter-day Saints page)
Note that all these estimates come from a a single source. However, that one source could at least point us out to the countries that have a decent community of Spiritists