In 2020, around 28.8 percent of the global population were identified as Christian. Around 25.6 percent of the global population identify as Muslims, followed by 14.9 percent of global populations as Hindu. The number of Muslims increased by 347 million, when compared to 2010 data, more than all other religions combined.

As of 2010, Christianity was the religion with the most followers worldwide, followed by Islam (Muslims) and Hinduism. In the forty years between 2010 and 2050, it is projected that the landscape of world religions will undergo some noticeable changes, with the number of Muslims almost catching up to Christians. The changes in population sizes of each religious group is largely dependent on demographic development, for example, the rise in the world's Christian population will largely be driven by population growth in Sub-Saharan Africa, while Muslim populations will rise across various regions of Africa and South Asia. As India's population is set to grow while China's goes into decline, this will be reflected in the fact that Hindus will outnumber the unaffiliated by 2050. In fact, India may be home to both the largest Hindu and Muslim populations in the world by the middle of this century.

From 2022 to 2060, the worldwide population of Muslims is expected to increase by 45.7 percent. For the same period, the global population of Buddhists is expected to decrease by 12.2 percent.

The World Religion Project (WRP) aims to provide detailed information about religious adherence worldwide since 1945. It contains data about the number of adherents by religion in each of the states in the international system. These numbers are given for every half-decade period (1945, 1950, etc., through 2010). Percentages of the states' populations that practice a given religion are also provided. (Note: These percentages are expressed as decimals, ranging from 0 to 1, where 0 indicates that 0 percent of the population practices a given religion and 1 indicates that 100 percent of the population practices that religion.) Some of the religions are divided into religious families. To the extent data are available, the breakdown of adherents within a given religion into religious families is also provided.

The project was developed in three stages. The first stage consisted of the formation of a religion tree. A religion tree is a systematic classification of major religions and of religious families within those major religions. To develop the religion tree we prepared a comprehensive literature review, the aim of which was (i) to define a religion, (ii) to find tangible indicators of a given religion of religious families within a major religion, and (iii) to identify existing efforts at classifying world religions. (Please see the original survey instrument to view the structure of the religion tree.) The second stage consisted of the identification of major data sources of religious adherence and the collection of data from these sources according to the religion tree classification. This created a dataset that included multiple records for some states for a given point in time. It also contained multiple missing data for specific states, specific time periods and specific religions. The third stage consisted of cleaning the data, reconciling discrepancies of information from different sources and imputing data for the missing cases.

The National Religion Dataset: The observation in this dataset is a state-five-year unit. This dataset provides information regarding the number of adherents by religions, as well as the percentage of the state's population practicing a given religion.

Census: Population: by Religion: Christian: Madhya Pradesh: Female data was reported at 107,985.000 Person in 03-01-2011. This records an increase from the previous number of 85,025.000 Person for 03-01-2001. Census: Population: by Religion: Christian: Madhya Pradesh: Female data is updated decadal, averaging 96,505.000 Person from Mar 2001 (Median) to 03-01-2011, with 2 observations. The data reached an all-time high of 107,985.000 Person in 03-01-2011 and a record low of 85,025.000 Person in 03-01-2001. Census: Population: by Religion: Christian: Madhya Pradesh: Female data remains active status in CEIC and is reported by Office of the Registrar General & Census Commissioner, India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.

Census: Population: by Religion: Christian: Lakshadweep: Male data was reported at 286.000 Person in 03-01-2011. This records a decrease from the previous number of 422.000 Person for 03-01-2001. Census: Population: by Religion: Christian: Lakshadweep: Male data is updated decadal, averaging 354.000 Person from Mar 2001 (Median) to 03-01-2011, with 2 observations. The data reached an all-time high of 422.000 Person in 03-01-2001 and a record low of 286.000 Person in 03-01-2011. Census: Population: by Religion: Christian: Lakshadweep: Male data remains active status in CEIC and is reported by Office of the Registrar General & Census Commissioner, India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.

Census: Population: by Religion: Christian: Maharashtra: Male data was reported at 531,916.000 Person in 03-01-2011. This records an increase from the previous number of 530,975.000 Person for 03-01-2001. Census: Population: by Religion: Christian: Maharashtra: Male data is updated decadal, averaging 531,445.500 Person from Mar 2001 (Median) to 03-01-2011, with 2 observations. The data reached an all-time high of 531,916.000 Person in 03-01-2011 and a record low of 530,975.000 Person in 03-01-2001. Census: Population: by Religion: Christian: Maharashtra: Male data remains active status in CEIC and is reported by Office of the Registrar General & Census Commissioner, India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.

Population: by Religion: Muslim data was reported at 300.000 Person th in 2017. This stayed constant from the previous number of 300.000 Person th for 2016. Population: by Religion: Muslim data is updated yearly, averaging 90.000 Person th from Dec 1997 (Median) to 2017, with 21 observations. The data reached an all-time high of 300.000 Person th in 2017 and a record low of 70.000 Person th in 2004. Population: by Religion: Muslim data remains active status in CEIC and is reported by Hong Kong Yearbook. The data is categorized under Global Database’s Hong Kong – Table HK.G011: Population: By Religion.

Population: Religion: Female: Taoism data was reported at 165.600 Person th in 2015. This records a decrease from the previous number of 172.222 Person th for 2010. Population: Religion: Female: Taoism data is updated yearly, averaging 165.600 Person th from Jun 2000 (Median) to 2015, with 3 observations. The data reached an all-time high of 172.222 Person th in 2010 and a record low of 105.267 Person th in 2000. Population: Religion: Female: Taoism data remains active status in CEIC and is reported by Department of Statistics. The data is categorized under Global Database’s Singapore – Table SG.G002: Population by Religion .

This dataset describes the world’s religious makeup in 2020 and 2010. We focus on seven categories: Christians, Muslims, Hindus, Buddhists, Jews, people who belong to other religions, and those who are religiously unaffiliated. This analysis is based on more than 2,700 sources of data, including national censuses, large-scale demographic surveys, general population surveys and population registers. For more information about this data, see the associated Pew Research Center report "How the Global Religious Landscape Changed From 2010 to 2020."

Singapore Population: Religion: Sikhism data was reported at 11.500 Person th in 2015. This records an increase from the previous number of 10.744 Person th for 2010. Singapore Population: Religion: Sikhism data is updated yearly, averaging 10.744 Person th from Jun 2000 (Median) to 2015, with 3 observations. The data reached an all-time high of 11.500 Person th in 2015 and a record low of 9.733 Person th in 2000. Singapore Population: Religion: Sikhism data remains active status in CEIC and is reported by Department of Statistics. The data is categorized under Global Database’s Singapore – Table SG.G002: Population by Religion .

As of 2020, Christianity was the largest religion in the world, with around 2.5 billion believers. In the second place was Islam, with around 1.9 billion adherents.

Christianity is the major religion in numerous African countries. As of 2024, around 96 percent of the population of Zambia was Christian, representing the highest percentage on the continent. Seychelles and Rwanda followed with roughly 95 percent and 94 percent of the population being Christian, respectively. While these countries present the highest percentages, Christianity was also prevalent in many other African nations. For instance, in South Africa, Christianity was the religion of nearly 85 percent of the people, while the share corresponded to 71 percent in Ghana. Religious variations across Africa Christianity and Islam are the most practiced religions in Africa. Christian adherents are prevalent below the Sahara, while North Africa is predominantly Muslim. In 2020, Christians accounted for around 60 percent of the Sub-Saharan African population, followed by Muslims with a share of roughly 30 percent. In absolute terms, there were approximately 650 million Christians in the region, a number forecast to increase to over one billion by 2050. In contrast, Islam is most prevalent in North Africa, being the religion of over 90 percent of the population in Algeria, Morocco, Tunisia, and Libya. Christianity in the world As opposed to other religions, Christianity is widely spread across continents worldwide. In fact, Sub-Saharan Africa, Latin America and the Caribbean, and Europe each account for around 25 percent of the global Christian population. By comparison, Asia-Pacific and North America make up 13 percent and 12 percent of Christians worldwide, respectively. In several regions, Christians also suffer persecution on religious grounds. Somalia and Libya presented the most critical situation in Africa in 2021, reporting the strongest suppression of Christians worldwide just after North Korea and Afghanistan.

Global population numbers by religion [13].

Singapore Population: Religion: Islam data was reported at 459.800 Person th in 2015. This records an increase from the previous number of 457.435 Person th for 2010. Singapore Population: Religion: Islam data is updated yearly, averaging 457.435 Person th from Jun 2000 (Median) to 2015, with 3 observations. The data reached an all-time high of 459.800 Person th in 2015 and a record low of 371.660 Person th in 2000. Singapore Population: Religion: Islam data remains active status in CEIC and is reported by Department of Statistics. The data is categorized under Global Database’s Singapore – Table SG.G002: Population by Religion .

India Census: Population: by Religion: Muslim data was reported at 172,245,158.000 Person in 2011. This records an increase from the previous number of 138,188,240.000 Person for 2001. India Census: Population: by Religion: Muslim data is updated yearly, averaging 155,216,699.000 Person from Mar 2001 (Median) to 2011, with 2 observations. The data reached an all-time high of 172,245,158.000 Person in 2011 and a record low of 138,188,240.000 Person in 2001. India Census: Population: by Religion: Muslim data remains active status in CEIC and is reported by Census of India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE001: Census: Population: by Religion.

This statistic shows the Denomination of the Christian population worldwide by major traditions in 2010. About 50 percent of all Christians are Catholics.

This statistic shows the top 25 countries in the world with the largest number of Christian population in 2010. In 2010, the United States was leading the ranking with about 243 million Christians living in the country.

India Census: Population: by Religion: Christian data was reported at 27,819,588.000 Person in 2011. This records an increase from the previous number of 24,080,016.000 Person for 2001. India Census: Population: by Religion: Christian data is updated yearly, averaging 25,949,802.000 Person from Mar 2001 (Median) to 2011, with 2 observations. The data reached an all-time high of 27,819,588.000 Person in 2011 and a record low of 24,080,016.000 Person in 2001. India Census: Population: by Religion: Christian data remains active status in CEIC and is reported by Census of India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.

Census: Population: by Religion: Christian: Haryana data was reported at 50,353.000 Person in 03-01-2011. This records an increase from the previous number of 27,185.000 Person for 03-01-2001. Census: Population: by Religion: Christian: Haryana data is updated decadal, averaging 38,769.000 Person from Mar 2001 (Median) to 03-01-2011, with 2 observations. The data reached an all-time high of 50,353.000 Person in 03-01-2011 and a record low of 27,185.000 Person in 03-01-2001. Census: Population: by Religion: Christian: Haryana data remains active status in CEIC and is reported by Office of the Registrar General & Census Commissioner, India. The data is categorized under India Premium Database’s Demographic – Table IN.GAE004: Census: Population: by Religion: Christian.